├── .gitignore ├── Sketch.fzz ├── imgs ├── Sketch.png ├── GabuinoZabbix.png └── GabuinoZabbixRecent.png ├── README.md ├── Arduino_Zabbix_Agent.ino └── LICENSE.md /.gitignore: -------------------------------------------------------------------------------- 1 | -------------------------------------------------------------------------------- /Sketch.fzz: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/interlegis/Arduino-Zabbix-Agent/HEAD/Sketch.fzz -------------------------------------------------------------------------------- /imgs/Sketch.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/interlegis/Arduino-Zabbix-Agent/HEAD/imgs/Sketch.png -------------------------------------------------------------------------------- /imgs/GabuinoZabbix.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/interlegis/Arduino-Zabbix-Agent/HEAD/imgs/GabuinoZabbix.png -------------------------------------------------------------------------------- /imgs/GabuinoZabbixRecent.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/interlegis/Arduino-Zabbix-Agent/HEAD/imgs/GabuinoZabbixRecent.png -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Arduino-Zabbix-Agent 2 | 3 | Using an Arduino Uno v3 and a Zabbix Server to monitor a data center environment. 4 | 5 | It's a Zabbix Agent tested and running successfully. 6 | 7 | * [Materials](#materials) 8 | * [Schematic](#schematic) 9 | * [More info](#more-info) 10 | * [DHT11](#dht11) 11 | * [DS18b20](#ds18b20) 12 | * [PIR](#pir) 13 | * [Soil humidity sensor](#soil-humidity-sensor) 14 | * [Led](#led) 15 | * [Observations](#observation) 16 | * [How to use](#how-to-use) 17 | * [Keys used on Zabbix](#keys-used-on-zabbix) 18 | * [On the code](#on-the-code) 19 | * [Example](#example) 20 | 21 | 22 | 23 | ## Materials: 24 | 25 | - Arduino Uno v3 26 | - Ethernet Shield 27 | - Arduino Sensor Shield* 28 | - DHT11 (or similar) and one 10k resistor 29 | - DS18b20 (or similar) and one 4.7k resistor 30 | - PIR (Passive infrared sensor/Motion detector) 31 | - Soil humidity sensor 32 | - One led and one 1k resistor 33 | 34 | ###### *A new shield may be built by yourself. 35 | 36 | ## Schematic: 37 | ![Schematic](imgs/Sketch.png) 38 | Schematic done using [Fritzing](http://www.fritzing.org). 39 | 40 | ### More info: 41 | 42 | #### `DHT11` 43 | This sensor can measure the air temperature and humidity. It doesn't need to be calibrated. It is recommended to take 1 sample per second or less. It returns one `int` for each data. The temperature is in Celsius. A 10k resistor must be connected to pins Vcc and Signal. 44 | 45 | #### `DS18b20` 46 | This sensor is responsible for measuring the air temperature and returning a `float`. It is fast enough to take one sample for each Arduino cpu clock. It doesn't need to be calibrated and is water-proof. The library `OneWire` is used for reading its data. This means it is possible to connect multiple DS18b20 sensors on a single Arduino port. The temperature is in Celsius. A single 4.7k resistor must be conected between Vcc and the pin connected to one or more sensor. 47 | 48 | #### `PIR` 49 | Plug and play sensor. Doesn't need resistor or adjustments. Its signal must be connected to an Arduino port and that's all. Returns `1` when detects motion and `0` when nothing is detected. 50 | 51 | #### `Soil humidity sensor` 52 | Tricky sensor. It returns `1` when it's dry and `0` when it detects humidity. Its output is digital. The sensibility must be adjusted by turning a small screwdriver on the sensor. 53 | 54 | #### `Led` 55 | Be careful! Leds are extremely fragile. It needs a 1k resistor in series to make it work. The brightness may vary depending on the model and color. In this project, the led is turned on when the Arduino receives a command and 56 | is turned off when the value is returned to the server. 57 | 58 | ### Observations: 59 | Some results are kept for a few seconds to avoid oscillations from the sensors. For example, PIR may get a positive (motion) result and then a null (motion stopped) before Zabbix check. So its value is kept for a few seconds on `1` to allow Zabbix to have enough time to read it. 60 | 61 | DS18b20 function is checked on every loop, but the sensors are read only once every 15 seconds. If the request is made on less than 15 seconds after the last one, it simply replies the variable value, making the response much faster. 62 | 63 | All temperature are in Celsius. 64 | To convert to Fahrenheit: 65 | ``` 66 | Temp F = 1.8*(Temp C) + 32 67 | ``` 68 | 69 | 70 | ## How to use: 71 | 72 | Check pins used. 73 | Upload the code to the Arduino. 74 | Add an item on Zabbix Server. 75 | - Type: Zabbix agent. 76 | - Key: The key for each sensor (`q`, `w`, `e`, `r`, `t` etc). 77 | - It is recommended to check each item on not less than once a minute. 78 | 79 | ## Keys used on Zabbix: 80 | 81 | * q - soil humidity 82 | * w - air temperature on DHT11 83 | * e - air humidity on DHT11 84 | * r - air temperature on DS18b20 with serial number ending with 17 85 | * f - air temperature on DS18b20 with serial number ending with B6 86 | * v - air temperature on DS18b20 with serial number ending with D3 87 | * t - motion detector 88 | 89 | ## On the code: 90 | 91 | Set the IP address, the gateway and the MAC address to be used by the agent. 92 | 93 | Check how many sensors will be used and add them to the code if necessary. To do this: 94 | * Set a pin using `#define`. 95 | * Write a function to read the sensor if necessary. 96 | * Choose a letter to be used as a command for each sensor function. Make sure the letter is not used anywhere else! 97 | * On `parseCommand`, add the function to be executed when receiving the command defined on the step before. 98 | 99 | __*Pins 10, 11, 12 and 13 cannot be used. They are used by the ethernet shield*.__ 100 | 101 | Pin 3 is the led. 102 | 103 | Pin 4 is the DHT11. 104 | 105 | Pin 5 is one or more DS18b20 (using OneWire). 106 | 107 | Pin 6 is the PIR. 108 | 109 | Pin A0 is the soil humidity sensor. 110 | 111 | ## Example: 112 | 113 | ![Zabbix](imgs/GabuinoZabbix.png) 114 | 115 | --- 116 | Zabbix Agent on Arduino Uno v3 117 | 118 | By [GabRF.com](http://gabrf.com) 119 | -------------------------------------------------------------------------------- /Arduino_Zabbix_Agent.ino: -------------------------------------------------------------------------------- 1 | //****************************************************************************** 2 | //* Purpose : Zabbix Sensor Agent - Environmental Monitoring Solution * 3 | //* Git : https://github.com/interlegis/arduino-zabbix-agent 4 | //* Author : Gabriel Ferreira and Marco Rougeth * 5 | //* https://github.com/gabrielrf and 6 | //* https://github.com/rougeth 7 | //* Adapted from : Evgeny Levkov and Schotte Vincent * 8 | //* Credits: * 9 | 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | //----------------------------- Network settings ------------------------------- 17 | byte mac[] = { 0x90, 0xA2, 0xDA, 0x00, 0xE3, 0x1B }; 18 | //IPAddress ip(10, 1, 2, 235); 19 | IPAddress ip(10, 1, 2, 61); 20 | IPAddress gateway(10, 1, 2, 254); 21 | IPAddress subnet(255, 255, 255, 0); 22 | 23 | //------------ Pins 10, 11, 12 e 13 are used by ethernet shield! --------------- 24 | #define MAX_CMD_LENGTH 25 25 | #define LED_PIN 3 // LED pin with 1k resistor 26 | #define DHT11_PIN 4 // DHT11 pin with a 10k resistor 27 | #define ONE_WIRE_PIN 5 // One wire pin with a 4.7k resistor 28 | #define PIR_PIN 6 // PIR pin 29 | #define SOIL_PIN A0 // Soil humidity sensor pin 30 | 31 | EthernetServer server(10050); 32 | EthernetClient client; 33 | OneWire ds(ONE_WIRE_PIN); 34 | dht DHT; 35 | 36 | boolean connected = false; 37 | byte i; 38 | byte present = 0; 39 | byte type_s; 40 | byte data[12]; 41 | byte addr[8]; 42 | double temp = 0; // Temperature 43 | double umid = 0; // Humidity 44 | float celsius; 45 | float oneWire17 = 0; 46 | float oneWireB6 = 0; 47 | float oneWireD3 = 0; 48 | String cmd; //FOR ZABBIX COMMAND 49 | String serialNum; 50 | int counter = 1; // For testing 51 | int chk; 52 | int presence = 0; 53 | int lastPresence = 0; 54 | int soil = 0; // Soil humidity 55 | int limite = 1; // Command size. Using 1 for better performance. 56 | int waitTime = 15000; // Default waiting time before reading sensor again. 57 | int pirWaitTime = 200000; // Default waiting time for PIR. 58 | unsigned long dhtLastCheck = 0; 59 | unsigned long pirLastCheck = 0; 60 | unsigned long oneWireLastCheck = 0; 61 | 62 | // Read all DS18b20 and saves the result on variables every 15 seconds. 63 | void readOneWire() { 64 | if (millis() - oneWireLastCheck > waitTime) { 65 | if ( !ds.search(addr)) { 66 | //Serial.println("No more addresses."); 67 | ds.reset_search(); 68 | //delay(250); 69 | return; 70 | } 71 | if (OneWire::crc8(addr, 7) != addr[7]) { 72 | Serial.println("CRC is not valid!"); 73 | return; 74 | } 75 | switch (addr[0]) { 76 | case 0x10: 77 | type_s = 1; 78 | break; 79 | case 0x28: 80 | type_s = 0; 81 | break; 82 | case 0x22: 83 | type_s = 0; 84 | break; 85 | default: 86 | Serial.println("Device is not a DS18x20 family device."); 87 | return; 88 | } 89 | ds.reset(); 90 | ds.select(addr); 91 | ds.write(0x44, 1); // start conversion, with parasite power on at the end 92 | //delay(1000); // maybe 750ms is enough, maybe not 93 | // we might do a ds.depower() here, but the reset will take care of it. 94 | present = ds.reset(); 95 | ds.select(addr); 96 | ds.write(0xBE); // Read Scratchpad 97 | for ( i = 0; i < 9; i++) { // we need 9 bytes 98 | data[i] = ds.read(); 99 | } 100 | int16_t raw = (data[1] << 8) | data[0]; 101 | if (type_s) { 102 | raw = raw << 3; // 9 bit resolution default 103 | if (data[7] == 0x10) { 104 | 105 | raw = (raw & 0xFFF0) + 12 - data[6]; 106 | } 107 | } else { 108 | byte cfg = (data[4] & 0x60); 109 | 110 | if (cfg == 0x00) raw = raw & ~7; // 9 bit resolution, 93.75 ms 111 | else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms 112 | else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms 113 | } 114 | celsius = (float)raw / 16.0; 115 | //Serial.print(celsius); 116 | //Serial.println(" Celsius"); 117 | serialNum = String(addr[7], HEX); 118 | if (serialNum == "17") oneWire17 = celsius; 119 | else if (serialNum == "b6") oneWireB6 = celsius; 120 | else if (serialNum == "d3") oneWireD3 = celsius; 121 | // If Fahrenheit needed, (Fahrenheit = Celsius * 1.8) + 32; 122 | 123 | oneWireLastCheck = millis(); 124 | } 125 | } 126 | 127 | // Read DHT11 every 15 seconds and save values on variables 128 | void readDHT11() { 129 | if (millis() - dhtLastCheck > waitTime) { 130 | chk = DHT.read11(DHT11_PIN); 131 | switch (chk) { 132 | case DHTLIB_OK: 133 | break; 134 | case DHTLIB_ERROR_CHECKSUM: 135 | Serial.print("Checksum error,\t"); 136 | break; 137 | case DHTLIB_ERROR_TIMEOUT: 138 | Serial.print("Time out error,\t"); 139 | break; 140 | default: 141 | Serial.print("Unknown error,\t"); 142 | break; 143 | } 144 | temp = DHT.temperature; 145 | umid = DHT.humidity; 146 | dhtLastCheck = millis(); 147 | } 148 | } 149 | 150 | // Read command received. 151 | void readTelnetCommand(char c) { 152 | if (cmd.length() == MAX_CMD_LENGTH) { 153 | cmd = ""; 154 | } 155 | cmd += c; 156 | if (c == '\n' || cmd.length() == limite) { 157 | parseCommand(); 158 | } 159 | else { 160 | } 161 | } 162 | 163 | // Read soil humidity sensor. 164 | void readSoil() { 165 | soil = digitalRead(SOIL_PIN); 166 | } 167 | 168 | // Read PIR and if positive, keep the value for pirWaitTime seconds. 169 | void readPresence() { 170 | if (digitalRead(PIR_PIN)) { 171 | pirLastCheck = millis(); 172 | lastPresence = 1; 173 | } 174 | if (digitalRead(PIR_PIN) && (lastPresence)) { 175 | presence = 1; 176 | } 177 | else { 178 | if (millis() - pirLastCheck > pirWaitTime) { 179 | presence = 0; 180 | lastPresence = 0; 181 | } 182 | } 183 | } 184 | 185 | //Commands received by agent on port 10050 parsing 186 | void parseCommand() { 187 | if (cmd.equals("")) { } 188 | else { 189 | counter = counter + 1; 190 | Serial.print(" Tempo: "); 191 | Serial.print(millis() / 1000); 192 | Serial.print("\t"); 193 | Serial.print("Cmd: "); 194 | Serial.print(cmd); 195 | Serial.print("\t\t"); 196 | Serial.print("Resposta: "); 197 | // AGENT ping 198 | if (cmd.equals("p")) { 199 | server.println("1"); 200 | } // Agent version 201 | else if (cmd.equals("l")) { 202 | //Serial.println("Version"); 203 | server.println("Arduino Zabbix Agent 1.0"); 204 | delay(100); 205 | } // Agent soil humidity 206 | else if (cmd.equals("q")) { 207 | readSoil(); 208 | Serial.print(soil); 209 | server.println(soil); 210 | // NOT SUPPORTED 211 | } // Agent air temperature 212 | else if (cmd.equals("w")) { 213 | readDHT11(); 214 | Serial.print(temp); 215 | server.println(temp); 216 | dhtLastCheck = millis() - waitTime; 217 | } // Agent air humidity 218 | else if (cmd.equals("e")) { 219 | readDHT11(); 220 | server.println(umid); 221 | Serial.print(umid); 222 | } else if (cmd.equals("r")) { 223 | server.println(oneWire17); 224 | Serial.print(oneWire17); 225 | } else if (cmd.equals("f")) { 226 | server.println(oneWireB6); 227 | Serial.print(oneWireB6); 228 | oneWireLastCheck = oneWireLastCheck - (waitTime/3); 229 | } else if (cmd.equals("v")) { 230 | server.println(oneWireD3); 231 | Serial.print(oneWireD3); 232 | oneWireLastCheck = oneWireLastCheck - (waitTime/3); 233 | } else if (cmd.equals("t")) { 234 | server.println(presence); 235 | Serial.print(presence); 236 | oneWireLastCheck = oneWireLastCheck - (waitTime/3); 237 | pirLastCheck = millis() - pirWaitTime; 238 | } else { // Agent error 239 | //server.print("ZBXDZBX_NOTSUPPORTED"); 240 | //server.print("Error"); 241 | } 242 | cmd = ""; 243 | Serial.println(""); 244 | client.stop(); 245 | } 246 | } 247 | 248 | // The loop that Arduino runs forever after the setup() function. 249 | void loop() { 250 | client = server.available(); 251 | if (client) { 252 | if (!connected) { 253 | Serial.println("Conection not available"); 254 | client.flush(); 255 | connected = true; 256 | client.stop(); 257 | } 258 | if (client.available() > 0) { 259 | Serial.println("Client Available"); 260 | Serial.println("Conection ok"); 261 | int clientread = client.read(); 262 | Serial.print(clientread); 263 | char charcr = clientread; 264 | digitalWrite(LED_PIN, HIGH); 265 | readTelnetCommand(clientread); 266 | digitalWrite(LED_PIN, LOW); 267 | } 268 | } 269 | if (millis()%2) { 270 | readPresence(); 271 | } 272 | else { 273 | readOneWire(); 274 | } 275 | } 276 | 277 | // This function runs once only, when the Arduino is turned on or reseted. 278 | void setup() { 279 | pinMode(LED_PIN, OUTPUT); 280 | Serial.begin(9600); 281 | //Serial.begin(115200); 282 | pinMode(SOIL_PIN, INPUT); 283 | Ethernet.begin(mac, ip, gateway, subnet); 284 | server.begin(); 285 | Serial.println("Setup"); 286 | delay(1000); 287 | } 288 | -------------------------------------------------------------------------------- /LICENSE.md: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 2, June 1991 3 | 4 | Copyright (C) 1989, 1991 Free Software Foundation, Inc., 5 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 6 | Everyone is permitted to copy and distribute verbatim copies 7 | of this license document, but changing it is not allowed. 8 | 9 | Preamble 10 | 11 | The licenses for most software are designed to take away your 12 | freedom to share and change it. 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THE ENTIRE RISK AS 266 | TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE 267 | PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, 268 | REPAIR OR CORRECTION. 269 | 270 | 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 271 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR 272 | REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, 273 | INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING 274 | OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED 275 | TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY 276 | YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER 277 | PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE 278 | POSSIBILITY OF SUCH DAMAGES. 279 | 280 | END OF TERMS AND CONDITIONS 281 | 282 | How to Apply These Terms to Your New Programs 283 | 284 | If you develop a new program, and you want it to be of the greatest 285 | possible use to the public, the best way to achieve this is to make it 286 | free software which everyone can redistribute and change under these terms. 287 | 288 | To do so, attach the following notices to the program. It is safest 289 | to attach them to the start of each source file to most effectively 290 | convey the exclusion of warranty; and each file should have at least 291 | the "copyright" line and a pointer to where the full notice is found. 292 | 293 | {description} 294 | Copyright (C) {year} {fullname} 295 | 296 | This program is free software; you can redistribute it and/or modify 297 | it under the terms of the GNU General Public License as published by 298 | the Free Software Foundation; either version 2 of the License, or 299 | (at your option) any later version. 300 | 301 | This program is distributed in the hope that it will be useful, 302 | but WITHOUT ANY WARRANTY; without even the implied warranty of 303 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 304 | GNU General Public License for more details. 305 | 306 | You should have received a copy of the GNU General Public License along 307 | with this program; if not, write to the Free Software Foundation, Inc., 308 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 309 | 310 | Also add information on how to contact you by electronic and paper mail. 311 | 312 | If the program is interactive, make it output a short notice like this 313 | when it starts in an interactive mode: 314 | 315 | Gnomovision version 69, Copyright (C) year name of author 316 | Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 317 | This is free software, and you are welcome to redistribute it 318 | under certain conditions; type `show c' for details. 319 | 320 | The hypothetical commands `show w' and `show c' should show the appropriate 321 | parts of the General Public License. Of course, the commands you use may 322 | be called something other than `show w' and `show c'; they could even be 323 | mouse-clicks or menu items--whatever suits your program. 324 | 325 | You should also get your employer (if you work as a programmer) or your 326 | school, if any, to sign a "copyright disclaimer" for the program, if 327 | necessary. Here is a sample; alter the names: 328 | 329 | Yoyodyne, Inc., hereby disclaims all copyright interest in the program 330 | `Gnomovision' (which makes passes at compilers) written by James Hacker. 331 | 332 | {signature of Ty Coon}, 1 April 1989 333 | Ty Coon, President of Vice 334 | 335 | This General Public License does not permit incorporating your program into 336 | proprietary programs. If your program is a subroutine library, you may 337 | consider it more useful to permit linking proprietary applications with the 338 | library. If this is what you want to do, use the GNU Lesser General 339 | Public License instead of this License. 340 | --------------------------------------------------------------------------------