├── NDIR_RasPi_C# ├── Assets │ ├── StoreLogo.png │ ├── SplashScreen.scale-200.png │ ├── LockScreenLogo.scale-200.png │ ├── Square44x44Logo.scale-200.png │ ├── Wide310x150Logo.scale-200.png │ ├── Square150x150Logo.scale-200.png │ └── Square44x44Logo.targetsize-24_altform-unplated.png ├── NDIR_TemporaryKey.pfx ├── App.xaml ├── project.json ├── .gitattributes ├── NDIR.csproj.user ├── Properties │ ├── AssemblyInfo.cs │ └── Default.rd.xml ├── MainPage.xaml ├── Package.appxmanifest ├── NDIR.sln ├── App.xaml.cs ├── NDIR.csproj └── MainPage.xaml.cs ├── .gitignore ├── NDIR_RasPi_Python ├── example.py └── NDIR.py ├── NDIR_I2C ├── examples │ └── ReadConcentration │ │ └── ReadConcentration.ino ├── NDIR_I2C.h └── NDIR_I2C.cpp ├── NDIR_SoftwareSerial ├── examples │ └── ReadConcentration │ │ └── ReadConcentration.ino ├── NDIR_SoftwareSerial.h └── NDIR_SoftwareSerial.cpp ├── LICENSE └── README.md /NDIR_RasPi_C#/Assets/StoreLogo.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/StoreLogo.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/NDIR_TemporaryKey.pfx: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/NDIR_TemporaryKey.pfx -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/SplashScreen.scale-200.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/SplashScreen.scale-200.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/LockScreenLogo.scale-200.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/LockScreenLogo.scale-200.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/Square44x44Logo.scale-200.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/Square44x44Logo.scale-200.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/Wide310x150Logo.scale-200.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/Wide310x150Logo.scale-200.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/Square150x150Logo.scale-200.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/Square150x150Logo.scale-200.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Assets/Square44x44Logo.targetsize-24_altform-unplated.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/SandboxElectronics/NDIR/master/NDIR_RasPi_C#/Assets/Square44x44Logo.targetsize-24_altform-unplated.png -------------------------------------------------------------------------------- /NDIR_RasPi_C#/App.xaml: -------------------------------------------------------------------------------- 1 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/project.json: -------------------------------------------------------------------------------- 1 | { 2 | "dependencies": { 3 | "Microsoft.NETCore.UniversalWindowsPlatform": "5.1.0" 4 | }, 5 | "frameworks": { 6 | "uap10.0": {} 7 | }, 8 | "runtimes": { 9 | "win10-arm": {}, 10 | "win10-arm-aot": {}, 11 | "win10-x86": {}, 12 | "win10-x86-aot": {}, 13 | "win10-x64": {}, 14 | "win10-x64-aot": {} 15 | } 16 | } -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | # Compiled Object files 2 | *.slo 3 | *.lo 4 | *.o 5 | *.obj 6 | 7 | # Precompiled Headers 8 | *.gch 9 | *.pch 10 | 11 | # Compiled Dynamic libraries 12 | *.so 13 | *.dylib 14 | *.dll 15 | 16 | # Fortran module files 17 | *.mod 18 | 19 | # Compiled Static libraries 20 | *.lai 21 | *.la 22 | *.a 23 | *.lib 24 | 25 | # Executables 26 | *.exe 27 | *.out 28 | *.app 29 | -------------------------------------------------------------------------------- /NDIR_RasPi_Python/example.py: -------------------------------------------------------------------------------- 1 | import NDIR 2 | import time 3 | 4 | sensor = NDIR.Sensor(0x4D) 5 | 6 | if sensor.begin() == False: 7 | print("Adaptor initialization FAILED!") 8 | exit() 9 | 10 | while True: 11 | if sensor.measure(): 12 | print("CO2 Concentration: " + str(sensor.ppm) + "ppm") 13 | else: 14 | print("Sensor communication ERROR.") 15 | 16 | time.sleep(1) 17 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/.gitattributes: -------------------------------------------------------------------------------- 1 | # Auto detect text files and perform LF normalization 2 | * text=auto 3 | 4 | # Custom for Visual Studio 5 | *.cs diff=csharp 6 | 7 | # Standard to msysgit 8 | *.doc diff=astextplain 9 | *.DOC diff=astextplain 10 | *.docx diff=astextplain 11 | *.DOCX diff=astextplain 12 | *.dot diff=astextplain 13 | *.DOT diff=astextplain 14 | *.pdf diff=astextplain 15 | *.PDF diff=astextplain 16 | *.rtf diff=astextplain 17 | *.RTF diff=astextplain 18 | -------------------------------------------------------------------------------- /NDIR_I2C/examples/ReadConcentration/ReadConcentration.ino: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | 4 | NDIR_I2C mySensor(0x4D); //Adaptor's I2C address (7-bit, default: 0x4D) 5 | 6 | void setup() 7 | { 8 | Serial.begin(9600); 9 | 10 | if (mySensor.begin()) { 11 | Serial.println("Wait 10 seconds for sensor initialization..."); 12 | delay(10000); 13 | } else { 14 | Serial.println("ERROR: Failed to connect to the sensor."); 15 | while(1); 16 | } 17 | } 18 | 19 | void loop() { 20 | if (mySensor.measure()) { 21 | Serial.print("CO2 Concentration is "); 22 | Serial.print(mySensor.ppm); 23 | Serial.println("ppm"); 24 | } else { 25 | Serial.println("Sensor communication error."); 26 | } 27 | 28 | delay(1000); 29 | } 30 | -------------------------------------------------------------------------------- /NDIR_SoftwareSerial/examples/ReadConcentration/ReadConcentration.ino: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | 4 | //Select 2 digital pins as SoftwareSerial's Rx and Tx. For example, Rx=2 Tx=3 5 | NDIR_SoftwareSerial mySensor(2, 3); 6 | 7 | void setup() 8 | { 9 | Serial.begin(9600); 10 | 11 | if (mySensor.begin()) { 12 | Serial.println("Wait 10 seconds for sensor initialization..."); 13 | delay(10000); 14 | } else { 15 | Serial.println("ERROR: Failed to connect to the sensor."); 16 | while(1); 17 | } 18 | } 19 | 20 | void loop() { 21 | if (mySensor.measure()) { 22 | Serial.print("CO2 Concentration is "); 23 | Serial.print(mySensor.ppm); 24 | Serial.println("ppm"); 25 | } else { 26 | Serial.println("Sensor communication error."); 27 | } 28 | 29 | delay(1000); 30 | } 31 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/NDIR.csproj.user: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 30F105C9-681E-420b-A277-7C086EAD8A4E 5 | false 6 | pi 7 | Universal 8 | true 9 | 10 | 11 | 30F105C9-681E-420b-A277-7C086EAD8A4E 12 | false 13 | pi 14 | Universal 15 | true 16 | 17 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | The MIT License (MIT) 2 | 3 | Copyright (c) 2016 Sandbox Electronics 4 | 5 | Permission is hereby granted, free of charge, to any person obtaining a copy 6 | of this software and associated documentation files (the "Software"), to deal 7 | in the Software without restriction, including without limitation the rights 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 | copies of the Software, and to permit persons to whom the Software is 10 | furnished to do so, subject to the following conditions: 11 | 12 | The above copyright notice and this permission notice shall be included in all 13 | copies or substantial portions of the Software. 14 | 15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 21 | SOFTWARE. 22 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Properties/AssemblyInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | using System.Runtime.CompilerServices; 3 | using System.Runtime.InteropServices; 4 | 5 | // General Information about an assembly is controlled through the following 6 | // set of attributes. Change these attribute values to modify the information 7 | // associated with an assembly. 8 | [assembly: AssemblyTitle("NDIR")] 9 | [assembly: AssemblyDescription("")] 10 | [assembly: AssemblyConfiguration("")] 11 | [assembly: AssemblyCompany("")] 12 | [assembly: AssemblyProduct("NDIR")] 13 | [assembly: AssemblyCopyright("Copyright © 2017")] 14 | [assembly: AssemblyTrademark("")] 15 | [assembly: AssemblyCulture("")] 16 | 17 | // Version information for an assembly consists of the following four values: 18 | // 19 | // Major Version 20 | // Minor Version 21 | // Build Number 22 | // Revision 23 | // 24 | // You can specify all the values or you can default the Build and Revision Numbers 25 | // by using the '*' as shown below: 26 | // [assembly: AssemblyVersion("1.0.*")] 27 | [assembly: AssemblyVersion("1.0.0.0")] 28 | [assembly: AssemblyFileVersion("1.0.0.0")] 29 | [assembly: ComVisible(false)] -------------------------------------------------------------------------------- /NDIR_SoftwareSerial/NDIR_SoftwareSerial.h: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is a example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products on 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V1.2 9 | 10 | Release Date: 11 | 2019-01-10 12 | 13 | Author: 14 | Tiequan Shao support@sandboxelectronics.com 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | #ifndef _NDIR_SOFTWARE_SERIAL_H_ 23 | #define _NDIR_SOFTWARE_SERIAL_H_ 24 | 25 | class NDIR_SoftwareSerial { 26 | public: 27 | NDIR_SoftwareSerial(uint8_t rx_pin, uint8_t tx_pin); 28 | 29 | uint32_t ppm; 30 | 31 | uint8_t begin(); 32 | uint8_t measure(); 33 | void calibrateZero(); 34 | void enableAutoCalibration(); 35 | void disableAutoCalibration(); 36 | 37 | private: 38 | SoftwareSerial serial; 39 | 40 | uint8_t parse(uint8_t *pbuf); 41 | 42 | static uint8_t cmd_measure[9]; 43 | static uint8_t cmd_calibrateZero[9]; 44 | static uint8_t cmd_enableAutoCalibration[9]; 45 | static uint8_t cmd_disableAutoCalibration[9]; 46 | }; 47 | #endif 48 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Properties/Default.rd.xml: -------------------------------------------------------------------------------- 1 | 17 | 18 | 19 | 20 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | -------------------------------------------------------------------------------- /NDIR_I2C/NDIR_I2C.h: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is a example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products on 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V1.2 9 | 10 | Release Date: 11 | 2018-10-16 12 | 13 | Author: 14 | Tiequan Shao support@sandboxelectronics.com 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | #ifndef _NDIR_I2C_H_ 23 | #define _NDIR_I2C_H_ 24 | 25 | class NDIR_I2C { 26 | public: 27 | NDIR_I2C(uint8_t i2c_addr); 28 | 29 | uint8_t i2c_addr; 30 | uint32_t ppm; 31 | 32 | uint8_t begin(); 33 | uint8_t measure(); 34 | uint8_t reset(); 35 | void calibrateZero(); 36 | void enableAutoCalibration(); 37 | void disableAutoCalibration(); 38 | 39 | private: 40 | static uint8_t cmd_measure[9]; 41 | static uint8_t cmd_calibrateZero[9]; 42 | static uint8_t cmd_enableAutoCalibration[9]; 43 | static uint8_t cmd_disableAutoCalibration[9]; 44 | 45 | uint8_t send(uint8_t *pdata, uint8_t n); 46 | uint8_t receive(uint8_t *pbuf, uint8_t n); 47 | uint8_t read_register(uint8_t reg_addr, uint8_t *pval); 48 | uint8_t write_register(uint8_t reg_addr, uint8_t *pdata, uint8_t n); 49 | uint8_t write_register(uint8_t reg_addr, uint8_t val); 50 | uint8_t parse (uint8_t *pbuf); 51 | }; 52 | #endif 53 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/MainPage.xaml: -------------------------------------------------------------------------------- 1 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/Package.appxmanifest: -------------------------------------------------------------------------------- 1 | 2 | 3 | 8 | 9 | 13 | 14 | 15 | 16 | 17 | NDIR 18 | Peng 19 | Assets\StoreLogo.png 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 34 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/NDIR.sln: -------------------------------------------------------------------------------- 1 | 2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio 14 4 | VisualStudioVersion = 14.0.25420.1 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NDIR", "NDIR.csproj", "{CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}" 7 | EndProject 8 | Global 9 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 10 | Debug|ARM = Debug|ARM 11 | Debug|x64 = Debug|x64 12 | Debug|x86 = Debug|x86 13 | Release|ARM = Release|ARM 14 | Release|x64 = Release|x64 15 | Release|x86 = Release|x86 16 | EndGlobalSection 17 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 18 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|ARM.ActiveCfg = Debug|ARM 19 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|ARM.Build.0 = Debug|ARM 20 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|ARM.Deploy.0 = Debug|ARM 21 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x64.ActiveCfg = Debug|x64 22 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x64.Build.0 = Debug|x64 23 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x64.Deploy.0 = Debug|x64 24 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x86.ActiveCfg = Debug|x86 25 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x86.Build.0 = Debug|x86 26 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Debug|x86.Deploy.0 = Debug|x86 27 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|ARM.ActiveCfg = Release|ARM 28 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|ARM.Build.0 = Release|ARM 29 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|ARM.Deploy.0 = Release|ARM 30 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x64.ActiveCfg = Release|x64 31 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x64.Build.0 = Release|x64 32 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x64.Deploy.0 = Release|x64 33 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x86.ActiveCfg = Release|x86 34 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x86.Build.0 = Release|x86 35 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1}.Release|x86.Deploy.0 = Release|x86 36 | EndGlobalSection 37 | GlobalSection(SolutionProperties) = preSolution 38 | HideSolutionNode = FALSE 39 | EndGlobalSection 40 | EndGlobal 41 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | This repository contains Arduino Libraries for Sandbox Electronics NDIR CO2 Sensor with UART/I2C Interface: 2 | http://sandboxelectronics.com/?product=mh-z16-ndir-co2-sensor-with-i2cuart-5v3-3v-interface-for-arduinoraspeberry-pi 3 | 4 | It contains two libraries. Normally only one is needed. 5 | - NDIR_I2C: for communication with the sensor via I2C. 6 | - NDIR_SoftwareSerial: for communication with the sensor via UART (SoftwareSerial). 7 | 8 | Note: The dip switch on the adaptor should be set to I2C or UART accordingly to select I2C or UART mode communication. 9 | 10 | Installling the library (the automatic way) 11 | 1. Click "Download ZIP" button in the top right cornor of this github page and uncompress it. 12 | 2. From the Arduino IDE, Click Sketch->Include Library->Add .ZIP Library..., a file explorer window should popup. 13 | 3. In the popup windows, navigate to the folder what was just uncompressed. 14 | 4. Select one of the following folders: 15 | - NDIR_I2C (which contains NDIR_I2C.cpp and NDIR_I2C.h) 16 | - NDIR_SoftwareSerial (which contains NDIR_SoftwareSerial.cpp and NDIR_SoftwareSerial.h) 17 | 5. Click Open. 18 | 6. Restart the Arduino IDE. The library should now be ready for use. 19 | 20 | Installling the library (the manual way) 21 | 1. Click "Download ZIP" button in the top right cornor of this github page and uncompress it. 22 | 2. From the uncompressed folder, copy one of the following folders to the /libraries/ folder. You may need to create the libraries subfolder if it does not already exist. 23 | - NDIR_I2C (which contains NDIR_I2C.cpp and NDIR_I2C.h) 24 | - NDIR_SoftwareSerial (which contains NDIR_SoftwareSerial.cpp and NDIR_SoftwareSerial.h) 25 | 3. Restart the Arduino IDE. The library should now be ready for use. 26 | 27 | It is recommended to use the automatic way because it automatically places the libraries to the correct path. For manual installation, the path of folder can be found by clicking File->Preferences in the Arduino IDE. The Sketchbook location is on the top of the Preferences page. 28 | - On Windows, libraries folder is normally located at "My Documents\Arduino\libraries" 29 | - On Mac, libraries folder is normally located at "Documents/Arduino/libraries" 30 | - On Linux, libraries folder is normally located at "/home//sketchbook/libraries" 31 | 32 | -------------------------------------------------------------------------------- /NDIR_RasPi_Python/NDIR.py: -------------------------------------------------------------------------------- 1 | import smbus 2 | import time 3 | 4 | class Sensor(): 5 | cmd_measure = [0xFF,0x01,0x9C,0x00,0x00,0x00,0x00,0x00,0x63] 6 | ppm = 0 7 | 8 | IOCONTROL = 0X0E << 3 9 | FCR = 0X02 << 3 10 | LCR = 0X03 << 3 11 | DLL = 0x00 << 3 12 | DLH = 0X01 << 3 13 | THR = 0X00 << 3 14 | RHR = 0x00 << 3 15 | TXLVL = 0X08 << 3 16 | RXLVL = 0X09 << 3 17 | 18 | def __init__(self, i2c_addr): 19 | self.i2c_addr = i2c_addr 20 | self.i2c = smbus.SMBus(1) 21 | 22 | def begin(self): 23 | try: 24 | self.write_register(self.IOCONTROL, 0x08) 25 | except IOError: 26 | pass 27 | 28 | trial = 10 29 | 30 | while trial > 0: 31 | trial = trial - 1 32 | 33 | try: 34 | self.write_register(self.FCR, 0x07) 35 | self.write_register(self.LCR, 0x83) 36 | self.write_register(self.DLL, 0x60) 37 | self.write_register(self.DLH, 0x00) 38 | self.write_register(self.LCR, 0x03) 39 | return True 40 | except IOError: 41 | pass 42 | 43 | return False 44 | 45 | def measure(self): 46 | try: 47 | self.write_register(self.FCR, 0x07) 48 | self.send(self.cmd_measure) 49 | time.sleep(0.01) 50 | self.parse(self.receive()) 51 | return True 52 | except IOError: 53 | return False 54 | 55 | def parse(self, response): 56 | checksum = 0 57 | 58 | if len(response) < 9: 59 | return 60 | 61 | for i in range (0, 9): 62 | checksum += response[i] 63 | 64 | if response[0] == 0xFF: 65 | if response[1] == 0x9C: 66 | if checksum % 256 == 0xFF: 67 | self.ppm = (response[2]<<24) + (response[3]<<16) + (response[4]<<8) + response[5] 68 | 69 | def read_register(self, reg_addr): 70 | time.sleep(0.001) 71 | return self.i2c.read_byte_data(self.i2c_addr, reg_addr) 72 | 73 | def write_register(self, reg_addr, val): 74 | time.sleep(0.001) 75 | self.i2c.write_byte_data(self.i2c_addr, reg_addr, val) 76 | 77 | def send(self, command): 78 | if self.read_register(self.TXLVL) >= len(command): 79 | self.i2c.write_i2c_block_data(self.i2c_addr, self.THR, command) 80 | 81 | def receive(self): 82 | n = 9 83 | buf = [] 84 | start = time.clock() 85 | 86 | while n > 0: 87 | rx_level = self.read_register(self.RXLVL) 88 | 89 | if rx_level > n: 90 | rx_level = n 91 | 92 | buf.extend(self.i2c.read_i2c_block_data(self.i2c_addr, self.RHR, rx_level)) 93 | n = n - rx_level 94 | 95 | if time.clock() - start > 0.2: 96 | break 97 | 98 | return buf 99 | -------------------------------------------------------------------------------- /NDIR_SoftwareSerial/NDIR_SoftwareSerial.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is a example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products on 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V1.2 9 | 10 | Release Date: 11 | 2019-01-10 12 | 13 | Author: 14 | Tiequan Shao support@sandboxelectronics.com 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | #include 23 | #include 24 | #define RECEIVE_TIMEOUT (100) 25 | 26 | #if ARDUINO >= 100 27 | #include "Arduino.h" 28 | #else 29 | #include "WProgram.h" 30 | #endif 31 | 32 | class SoftwareSerial; 33 | 34 | uint8_t NDIR_SoftwareSerial::cmd_measure[9] = {0xFF,0x01,0x9C,0x00,0x00,0x00,0x00,0x00,0x63}; 35 | uint8_t NDIR_SoftwareSerial::cmd_calibrateZero[9] = {0xFF,0x01,0x87,0x00,0x00,0x00,0x00,0x00,0x78}; 36 | uint8_t NDIR_SoftwareSerial::cmd_enableAutoCalibration[9] = {0xFF,0x01,0x79,0xA0,0x00,0x00,0x00,0x00,0xE6}; 37 | uint8_t NDIR_SoftwareSerial::cmd_disableAutoCalibration[9] = {0xFF,0x01,0x79,0x00,0x00,0x00,0x00,0x00,0x86}; 38 | 39 | NDIR_SoftwareSerial::NDIR_SoftwareSerial(uint8_t rx_pin, uint8_t tx_pin) : serial(rx_pin, tx_pin, false) 40 | { 41 | } 42 | 43 | 44 | uint8_t NDIR_SoftwareSerial::begin() 45 | { 46 | serial.begin(9600); 47 | 48 | if (measure()) { 49 | return true; 50 | } else { 51 | return false; 52 | } 53 | } 54 | 55 | uint8_t NDIR_SoftwareSerial::measure() 56 | { 57 | uint8_t i; 58 | uint8_t buf[9]; 59 | uint32_t start = millis(); 60 | 61 | serial.flush(); 62 | 63 | for (i=0; i<9; i++) { 64 | serial.write(cmd_measure[i]); 65 | } 66 | 67 | for (i=0; i<9;) { 68 | if (serial.available()) { 69 | buf[i++] = serial.read(); 70 | } 71 | 72 | if (millis() - start > RECEIVE_TIMEOUT) { 73 | return false; 74 | } 75 | } 76 | 77 | if (parse(buf)) { 78 | return true; 79 | } 80 | 81 | return false; 82 | } 83 | 84 | 85 | void NDIR_SoftwareSerial::calibrateZero() 86 | { 87 | uint8_t i; 88 | 89 | for (i=0; i<9; i++) { 90 | serial.write(cmd_calibrateZero[i]); 91 | } 92 | } 93 | 94 | 95 | void NDIR_SoftwareSerial::enableAutoCalibration() 96 | { 97 | uint8_t i; 98 | 99 | for (i=0; i<9; i++) { 100 | serial.write(cmd_enableAutoCalibration[i]); 101 | } 102 | } 103 | 104 | 105 | void NDIR_SoftwareSerial::disableAutoCalibration() 106 | { 107 | uint8_t i; 108 | 109 | for (i=0; i<9; i++) { 110 | serial.write(cmd_disableAutoCalibration[i]); 111 | } 112 | } 113 | 114 | 115 | uint8_t NDIR_SoftwareSerial::parse(uint8_t *pbuf) 116 | { 117 | uint8_t i; 118 | uint8_t checksum = 0; 119 | 120 | for (i=0; i<9; i++) { 121 | checksum += pbuf[i]; 122 | } 123 | 124 | if (pbuf[0] == 0xFF && pbuf[1] == 0x9C && checksum == 0xFF) { 125 | ppm = (uint32_t)pbuf[2] << 24 | (uint32_t)pbuf[3] << 16 | (uint32_t)pbuf[4] << 8 | pbuf[5]; 126 | return true; 127 | } else { 128 | return false; 129 | } 130 | } 131 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/App.xaml.cs: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is the C# example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products at 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V0.5 9 | 10 | Release Date: 11 | 2017-01-17 12 | 13 | Author: 14 | Peng Wei 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | using System; 23 | using System.Collections.Generic; 24 | using System.IO; 25 | using System.Linq; 26 | using System.Runtime.InteropServices.WindowsRuntime; 27 | using Windows.ApplicationModel; 28 | using Windows.ApplicationModel.Activation; 29 | using Windows.Foundation; 30 | using Windows.Foundation.Collections; 31 | using Windows.UI.Xaml; 32 | using Windows.UI.Xaml.Controls; 33 | using Windows.UI.Xaml.Controls.Primitives; 34 | using Windows.UI.Xaml.Data; 35 | using Windows.UI.Xaml.Input; 36 | using Windows.UI.Xaml.Media; 37 | using Windows.UI.Xaml.Navigation; 38 | 39 | namespace NDIR 40 | { 41 | /// 42 | /// Provides application-specific behavior to supplement the default Application class. 43 | /// 44 | sealed partial class App : Application 45 | { 46 | /// 47 | /// Initializes the singleton application object. This is the first line of authored code 48 | /// executed, and as such is the logical equivalent of main() or WinMain(). 49 | /// 50 | public App() 51 | { 52 | this.InitializeComponent(); 53 | this.Suspending += OnSuspending; 54 | } 55 | 56 | /// 57 | /// Invoked when the application is launched normally by the end user. Other entry points 58 | /// will be used such as when the application is launched to open a specific file. 59 | /// 60 | /// Details about the launch request and process. 61 | protected override void OnLaunched(LaunchActivatedEventArgs e) 62 | { 63 | 64 | #if DEBUG 65 | if (System.Diagnostics.Debugger.IsAttached) 66 | { 67 | this.DebugSettings.EnableFrameRateCounter = true; 68 | } 69 | #endif 70 | 71 | Frame rootFrame = Window.Current.Content as Frame; 72 | 73 | // Do not repeat app initialization when the Window already has content, 74 | // just ensure that the window is active 75 | if (rootFrame == null) 76 | { 77 | // Create a Frame to act as the navigation context and navigate to the first page 78 | rootFrame = new Frame(); 79 | // Set the default language 80 | rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0]; 81 | 82 | rootFrame.NavigationFailed += OnNavigationFailed; 83 | 84 | if (e.PreviousExecutionState == ApplicationExecutionState.Terminated) 85 | { 86 | //TODO: Load state from previously suspended application 87 | } 88 | 89 | // Place the frame in the current Window 90 | Window.Current.Content = rootFrame; 91 | } 92 | 93 | if (rootFrame.Content == null) 94 | { 95 | // When the navigation stack isn't restored navigate to the first page, 96 | // configuring the new page by passing required information as a navigation 97 | // parameter 98 | rootFrame.Navigate(typeof(MainPage), e.Arguments); 99 | } 100 | // Ensure the current window is active 101 | Window.Current.Activate(); 102 | } 103 | 104 | /// 105 | /// Invoked when Navigation to a certain page fails 106 | /// 107 | /// The Frame which failed navigation 108 | /// Details about the navigation failure 109 | void OnNavigationFailed(object sender, NavigationFailedEventArgs e) 110 | { 111 | throw new Exception("Failed to load Page " + e.SourcePageType.FullName); 112 | } 113 | 114 | /// 115 | /// Invoked when application execution is being suspended. Application state is saved 116 | /// without knowing whether the application will be terminated or resumed with the contents 117 | /// of memory still intact. 118 | /// 119 | /// The source of the suspend request. 120 | /// Details about the suspend request. 121 | private void OnSuspending(object sender, SuspendingEventArgs e) 122 | { 123 | var deferral = e.SuspendingOperation.GetDeferral(); 124 | //TODO: Save application state and stop any background activity 125 | deferral.Complete(); 126 | } 127 | } 128 | } 129 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/NDIR.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Debug 6 | x86 7 | {CA27CCD4-A81C-48CF-AEAB-25D45168C4E1} 8 | AppContainerExe 9 | Properties 10 | NDIR 11 | NDIR 12 | en-US 13 | UAP 14 | 10.0.14393.0 15 | 10.0.10240.0 16 | 14 17 | 512 18 | {A5A43C5B-DE2A-4C0C-9213-0A381AF9435A};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC} 19 | NDIR_TemporaryKey.pfx 20 | 21 | 22 | true 23 | bin\x86\Debug\ 24 | DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP 25 | ;2008 26 | full 27 | x86 28 | false 29 | prompt 30 | true 31 | 32 | 33 | bin\x86\Release\ 34 | TRACE;NETFX_CORE;WINDOWS_UWP 35 | true 36 | ;2008 37 | pdbonly 38 | x86 39 | false 40 | prompt 41 | true 42 | true 43 | 44 | 45 | true 46 | bin\ARM\Debug\ 47 | DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP 48 | ;2008 49 | full 50 | ARM 51 | false 52 | prompt 53 | true 54 | 55 | 56 | bin\ARM\Release\ 57 | TRACE;NETFX_CORE;WINDOWS_UWP 58 | true 59 | ;2008 60 | pdbonly 61 | ARM 62 | false 63 | prompt 64 | true 65 | true 66 | 67 | 68 | true 69 | bin\x64\Debug\ 70 | DEBUG;TRACE;NETFX_CORE;WINDOWS_UWP 71 | ;2008 72 | full 73 | x64 74 | false 75 | prompt 76 | true 77 | 78 | 79 | bin\x64\Release\ 80 | TRACE;NETFX_CORE;WINDOWS_UWP 81 | true 82 | ;2008 83 | pdbonly 84 | x64 85 | false 86 | prompt 87 | true 88 | true 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | App.xaml 97 | 98 | 99 | MainPage.xaml 100 | 101 | 102 | 103 | 104 | 105 | Designer 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | MSBuild:Compile 122 | Designer 123 | 124 | 125 | MSBuild:Compile 126 | Designer 127 | 128 | 129 | 130 | 14.0 131 | 132 | 133 | 140 | -------------------------------------------------------------------------------- /NDIR_I2C/NDIR_I2C.cpp: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is a example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products on 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V1.2 9 | 10 | Release Date: 11 | 2018-10-16 12 | 13 | Author: 14 | Tiequan Shao support@sandboxelectronics.com 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | #include 23 | #include 24 | 25 | //General Registers 26 | #define RHR (0x00) 27 | #define THR (0X00) 28 | #define IER (0X01) 29 | #define FCR (0X02) 30 | #define IIR (0X02) 31 | #define LCR (0X03) 32 | #define MCR (0X04) 33 | #define LSR (0X05) 34 | #define MSR (0X06) 35 | #define SPR (0X07) 36 | #define TCR (0X06) 37 | #define TLR (0X07) 38 | #define TXLVL (0X08) 39 | #define RXLVL (0X09) 40 | #define IODIR (0X0A) 41 | #define IOSTATE (0X0B) 42 | #define IOINTENA (0X0C) 43 | #define IOCONTROL (0X0E) 44 | #define EFCR (0X0F) 45 | 46 | //Special Registers 47 | #define DLL (0x00) 48 | #define DLH (0X01) 49 | 50 | //Enhanced Registers 51 | #define EFR (0X02) 52 | #define XON1 (0X04) 53 | #define XON2 (0X05) 54 | #define XOFF1 (0X06) 55 | #define XOFF2 (0X07) 56 | 57 | //Application Related 58 | #define SC16IS750_CRYSTCAL_FREQ (14745600UL) 59 | #define RECEIVE_TIMEOUT (100) 60 | 61 | #if ARDUINO >= 100 62 | #include "Arduino.h" 63 | #else 64 | #include "WProgram.h" 65 | #endif 66 | 67 | #define WIRE Wire 68 | 69 | uint8_t NDIR_I2C::cmd_measure[9] = {0xFF,0x01,0x9C,0x00,0x00,0x00,0x00,0x00,0x63}; 70 | uint8_t NDIR_I2C::cmd_calibrateZero[9] = {0xFF,0x01,0x87,0x00,0x00,0x00,0x00,0x00,0x78}; 71 | uint8_t NDIR_I2C::cmd_enableAutoCalibration[9] = {0xFF,0x01,0x79,0xA0,0x00,0x00,0x00,0x00,0xE6}; 72 | uint8_t NDIR_I2C::cmd_disableAutoCalibration[9] = {0xFF,0x01,0x79,0x00,0x00,0x00,0x00,0x00,0x86}; 73 | 74 | NDIR_I2C::NDIR_I2C(uint8_t i2c_addr) 75 | { 76 | if (i2c_addr >= 8 && i2c_addr < 120) { 77 | NDIR_I2C::i2c_addr = i2c_addr; 78 | } else { 79 | NDIR_I2C::i2c_addr = 0; 80 | } 81 | } 82 | 83 | 84 | uint8_t NDIR_I2C::begin() 85 | { 86 | if (i2c_addr) { 87 | WIRE.begin(); 88 | write_register(IOCONTROL, 0x08); 89 | 90 | if (write_register(FCR, 0x07)) { 91 | if (write_register(LCR, 0x83)) { 92 | if (write_register(DLL, 0x60)) { 93 | if (write_register(DLH, 0x00)) { 94 | if (write_register(LCR, 0x03)) { 95 | if (measure()) { 96 | return true; 97 | } 98 | } 99 | } 100 | } 101 | } 102 | } 103 | } 104 | 105 | return false; 106 | } 107 | 108 | uint8_t NDIR_I2C::measure() 109 | { 110 | uint8_t buf[9]; 111 | 112 | if (i2c_addr) { 113 | if (write_register(FCR, 0x07)) { 114 | delayMicroseconds(1); 115 | 116 | if (send(cmd_measure, 9)) { 117 | if (receive(buf, 9)) { 118 | if (parse(buf)) { 119 | return true; 120 | } 121 | } 122 | } 123 | } 124 | } 125 | 126 | return false; 127 | } 128 | 129 | 130 | uint8_t NDIR_I2C::reset() 131 | { 132 | if (i2c_addr) { 133 | if (write_register(IOSTATE, 0x00)) { 134 | if (write_register(IODIR, 0x01)) { 135 | delay(1000); 136 | 137 | if (write_register(IOSTATE, 0x01)) { 138 | return true; 139 | } 140 | } 141 | } 142 | } 143 | 144 | return false; 145 | } 146 | 147 | 148 | void NDIR_I2C::calibrateZero() 149 | { 150 | if (i2c_addr) { 151 | if (write_register(FCR, 0x07)) { 152 | delayMicroseconds(1); 153 | send(cmd_calibrateZero, 9); 154 | delay(100); 155 | } 156 | } 157 | } 158 | 159 | 160 | void NDIR_I2C::enableAutoCalibration() 161 | { 162 | if (i2c_addr) { 163 | if (write_register(FCR, 0x07)) { 164 | delayMicroseconds(1); 165 | send(cmd_enableAutoCalibration, 9); 166 | delay(100); 167 | } 168 | } 169 | } 170 | 171 | 172 | void NDIR_I2C::disableAutoCalibration() 173 | { 174 | if (i2c_addr) { 175 | if (write_register(FCR, 0x07)) { 176 | delayMicroseconds(1); 177 | send(cmd_disableAutoCalibration, 9); 178 | delay(100); 179 | } 180 | } 181 | } 182 | 183 | 184 | uint8_t NDIR_I2C::parse (uint8_t *pbuf) 185 | { 186 | uint8_t i; 187 | uint8_t checksum = 0; 188 | 189 | for (i=0; i<9; i++) { 190 | checksum += pbuf[i]; 191 | } 192 | 193 | if (pbuf[0] == 0xFF && pbuf[1] == 0x9C && checksum == 0xFF) { 194 | ppm = (uint32_t)pbuf[2] << 24 | (uint32_t)pbuf[3] << 16 | (uint32_t)pbuf[4] << 8 | pbuf[5]; 195 | return true; 196 | } else { 197 | return false; 198 | } 199 | } 200 | 201 | 202 | uint8_t NDIR_I2C::send(uint8_t *pdata, uint8_t n) { 203 | uint8_t result; 204 | 205 | if (read_register(TXLVL, &result)) { 206 | if (result >= n) { 207 | if (write_register(THR, pdata, n)) { 208 | return true; 209 | } 210 | } 211 | } 212 | 213 | return false; 214 | } 215 | 216 | 217 | uint8_t NDIR_I2C::receive(uint8_t *pbuf, uint8_t n) { 218 | uint8_t i; 219 | uint8_t rx_level; 220 | uint32_t start = millis(); 221 | 222 | while (n) { 223 | if (read_register(RXLVL, &rx_level)) { 224 | if (rx_level > n) { 225 | rx_level = n; 226 | } 227 | 228 | if (rx_level) { 229 | WIRE.beginTransmission(i2c_addr); 230 | WIRE.write(RHR << 3); 231 | 232 | if (WIRE.endTransmission() != 0) { 233 | return false; 234 | }//delay(10); 235 | 236 | if (rx_level == WIRE.requestFrom(i2c_addr, rx_level)) { 237 | for (i=0; i RECEIVE_TIMEOUT) { 251 | return false; 252 | } 253 | } 254 | 255 | return true; 256 | } 257 | 258 | 259 | uint8_t NDIR_I2C::read_register(uint8_t reg_addr, uint8_t *pval) 260 | { 261 | uint8_t result; 262 | 263 | WIRE.beginTransmission(i2c_addr); 264 | WIRE.write(reg_addr << 3); 265 | 266 | if (WIRE.endTransmission() != 0) { 267 | return false; 268 | } 269 | 270 | if (WIRE.requestFrom(i2c_addr, (uint8_t)1) != 1) { 271 | return false; 272 | } 273 | 274 | *pval = WIRE.read(); 275 | return true; 276 | } 277 | 278 | 279 | uint8_t NDIR_I2C::write_register(uint8_t reg_addr, uint8_t *pdata, uint8_t n) 280 | { 281 | uint8_t result; 282 | 283 | WIRE.beginTransmission(i2c_addr); 284 | WIRE.write(reg_addr << 3); 285 | 286 | while (n--) { 287 | WIRE.write(*pdata); 288 | pdata++; 289 | } 290 | 291 | if (WIRE.endTransmission() != 0) { 292 | return false; 293 | } else { 294 | return true; 295 | } 296 | } 297 | 298 | 299 | uint8_t NDIR_I2C::write_register(uint8_t reg_addr, uint8_t val) 300 | { 301 | return write_register(reg_addr, &val, 1); 302 | } 303 | 304 | -------------------------------------------------------------------------------- /NDIR_RasPi_C#/MainPage.xaml.cs: -------------------------------------------------------------------------------- 1 | /* 2 | Description: 3 | This is the C# example code for Sandbox Electronics NDIR CO2 sensor module. 4 | You can get one of those products at 5 | http://sandboxelectronics.com 6 | 7 | Version: 8 | V0.5 9 | 10 | Release Date: 11 | 2017-01-17 12 | 13 | Author: 14 | Peng Wei 15 | 16 | Lisence: 17 | CC BY-NC-SA 3.0 18 | 19 | Please keep the above information when you use this code in your project. 20 | */ 21 | 22 | using System; 23 | using System.Threading; 24 | using System.Linq; 25 | using Windows.UI.Xaml.Controls; 26 | using Windows.Devices.I2c; 27 | 28 | namespace NDIR 29 | { 30 | public sealed partial class MainPage : Page 31 | { 32 | private const byte ADAPTOR_I2C_ADDR = 0x4D; /* 7-bit I2C address of the Adaptor */ 33 | private const byte IOCONTROL = (byte)(0x0E << 3); 34 | private const byte FCR = (byte)(0x02 << 3); 35 | private const byte LCR = (byte)(0x03 << 3); 36 | private const byte DLL = (byte)(0x00 << 3); 37 | private const byte DLH = (byte)(0x01 << 3); 38 | private const byte THR = (byte)(0x00 << 3); 39 | private const byte RHR = (byte)(0x00 << 3); 40 | private const byte TXLVL = (byte)(0x08 << 3); 41 | private const byte RXLVL = (byte)(0x09 << 3); 42 | private const byte SPR = (byte)(0x07 << 3); 43 | private byte[] CMD_READ_CONCENTRATION = {0xFF, 0x01, 0x9C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x63}; 44 | 45 | private I2cDevice Adaptor; 46 | private Timer PeriodicTimer; 47 | 48 | private byte[] Response = new byte[9]; 49 | private int Concentration; 50 | private String TextError = ""; 51 | 52 | public MainPage() 53 | { 54 | this.InitializeComponent(); 55 | 56 | /* Register for the unloaded event so we can clean up upon exit */ 57 | Unloaded += MainPage_Unloaded; 58 | 59 | /* Initialize the I2C bus, accelerometer, and timer */ 60 | InitSensor(); 61 | } 62 | 63 | private async void InitSensor() 64 | { 65 | var settings = new I2cConnectionSettings(ADAPTOR_I2C_ADDR); 66 | settings.BusSpeed = I2cBusSpeed.FastMode; 67 | var controller = await I2cController.GetDefaultAsync(); 68 | Adaptor = controller.GetDevice(settings); 69 | 70 | /* Reset Adaptor */ 71 | try 72 | { 73 | WriteRegister(IOCONTROL, 0x08); 74 | } 75 | catch 76 | { 77 | /* ignore NACK exception after software reset */ 78 | } 79 | 80 | /* Ping Adaptor */ 81 | try 82 | { 83 | WriteRegister(SPR, 0x5A); 84 | 85 | if (ReadRegister(SPR) != 0x5A) 86 | { 87 | Text_Error.Text = "Ping FAILED."; 88 | return; 89 | } 90 | } 91 | catch (Exception ex) 92 | { 93 | Text_Error.Text = "I2C Communication Failed: " + ex.Message; 94 | return; 95 | } 96 | 97 | /* Configure Adaptor (FIFO, Baudrate setting etc.) */ 98 | try 99 | { 100 | WriteRegister(FCR, 0x07); 101 | WriteRegister(LCR, 0x83); 102 | WriteRegister(DLL, 0x60); 103 | WriteRegister(DLH, 0x00); 104 | WriteRegister(LCR, 0x03); 105 | } 106 | catch (Exception ex) 107 | { 108 | Text_Error.Text = "Failed to Initialize Adaptor: " + ex.Message; 109 | return; 110 | } 111 | 112 | /* Now that everything is initialized, create a timer so we read concentration every 2 seconds */ 113 | PeriodicTimer = new Timer(this.TimerCallback, null, 0, 2000); 114 | } 115 | 116 | private void MainPage_Unloaded(object sender, object args) 117 | { 118 | /* Cleanup */ 119 | Adaptor.Dispose(); 120 | } 121 | 122 | private void TimerCallback(object state) 123 | { 124 | String textConcentration = "ERROR"; 125 | String textResponse = ""; 126 | 127 | if (ReadConcentration()) 128 | { 129 | textConcentration = String.Format("{0:F0}", Concentration); 130 | textResponse = String.Format("[{0:F3}]: {1}", Environment.TickCount / 1000, BitConverter.ToString(Response)); 131 | } 132 | 133 | /* UI updates must be invoked on the UI thread */ 134 | var task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () => 135 | { 136 | Text_Concentration.Text = textConcentration; 137 | Text_Response.Text = textResponse; 138 | Text_Error.Text = TextError; 139 | }); 140 | } 141 | 142 | private bool ReadConcentration() 143 | { 144 | byte[] rhr = { RHR }; 145 | int start; 146 | 147 | try 148 | { 149 | /* Clear Tx and Rx FIFO */ 150 | WriteRegister(FCR, 0x07); 151 | 152 | /* Send command to read concentration */ 153 | SendCommand(CMD_READ_CONCENTRATION); 154 | 155 | /* Mark a time in order to avoid dead loop */ 156 | start = Environment.TickCount; 157 | 158 | while (true) 159 | { 160 | if (ReadRegister(RXLVL) >= 9) 161 | { 162 | Adaptor.WriteRead(rhr, Response); 163 | 164 | if (ValidateResponse()) 165 | { 166 | Concentration = (Response[2] << 24) + (Response[3] << 16) + (Response[4] << 8) + Response[5]; 167 | TextError = ""; 168 | return true; 169 | } 170 | else 171 | { 172 | break; 173 | } 174 | } 175 | 176 | if (Environment.TickCount >= start) 177 | { 178 | if (Environment.TickCount - start > 200) 179 | { 180 | break; 181 | } 182 | } 183 | else 184 | { 185 | if (Environment.TickCount > 200) 186 | { 187 | break; 188 | } 189 | } 190 | } 191 | 192 | TextError = "Commnication Error."; 193 | return false; 194 | } 195 | catch (Exception ex) 196 | { 197 | TextError = "Commnication Error: " + ex.Message; 198 | return false; 199 | } 200 | } 201 | 202 | private byte ReadRegister(byte reg_addr) 203 | { 204 | byte[] RegAddrBuf = { reg_addr }; 205 | byte[] ReadBuf = new byte[1]; 206 | 207 | I2cTransferResult result = Adaptor.WriteReadPartial(RegAddrBuf, ReadBuf); 208 | 209 | if (result.Status == I2cTransferStatus.FullTransfer) 210 | { 211 | return ReadBuf[0]; 212 | } 213 | else 214 | { 215 | return 0; 216 | } 217 | } 218 | 219 | private void WriteRegister(byte reg_addr, byte val) 220 | { 221 | byte[] WriteBuf = { reg_addr, val }; 222 | 223 | Adaptor.Write(WriteBuf); 224 | } 225 | 226 | private void SendCommand(byte[] command) 227 | { 228 | byte[] WriteBuf = { THR }; 229 | WriteBuf = WriteBuf.Concat(command).ToArray(); 230 | 231 | if (ReadRegister(TXLVL) >= command.Length) 232 | { 233 | Adaptor.Write(WriteBuf); 234 | } 235 | } 236 | 237 | private bool ValidateResponse() 238 | { 239 | byte sum = 0; 240 | 241 | foreach (byte b in Response) 242 | { 243 | sum += b; 244 | } 245 | 246 | if (sum == 0xFF) 247 | { 248 | return true; 249 | } 250 | else 251 | { 252 | return false; 253 | } 254 | } 255 | } 256 | } 257 | --------------------------------------------------------------------------------