// FARM DATA RELAY SYSTEM // // BMP280 SENSOR MODULE // // Developed by Timm Bogner (bogner1@gmail.com) for Sola Gratia Farm in Urbana, Illinois, USA. // Each sensor is assigned a two-byte identifier along with a one-byte sensor type // #define TERM_MAC 0x00 //Terminal MAC #define SLEEPYTIME 30 //Time to sleep in seconds #define TEMP_ID 5 //Unique ID (0 - 255) for each data reading #define PRES_ID 6 #include #include #include #include "DataReading.h" Adafruit_BMP280 bmp; //0x76 uint8_t broadcastAddress[] = {0xAA, 0xBB, 0xCC, 0xDD, 0xEE, TERM_MAC}; int wait_time = 0; void OnDataSent(uint8_t *mac_addr, uint8_t sendStatus) { Serial.print("Last Packet Send Status: "); if (sendStatus == 0) { Serial.println("Delivery success"); } else { Serial.println("Delivery fail"); } } void setup() { Serial.begin(115200); Wire.begin(); while (!bmp.begin(0x76)) { delay(10); } Serial.println("BMP INIT"); if (esp_now_init() != 0) { return; } esp_now_set_self_role(ESP_NOW_ROLE_COMBO); esp_now_register_send_cb(OnDataSent); // Register peer esp_now_add_peer(broadcastAddress, ESP_NOW_ROLE_COMBO, 0, NULL, 0); } void loop() { if (millis() > wait_time) { wait_time = wait_time + SLEEPYTIME * 1000; loadData(); } } void loadData() { float bmp_temp = bmp.readTemperature(); float bmp_pressure = (bmp.readPressure() / 100.0F); //float bme_altitude = bmp.readAltitude(1013.25); Serial.println(bmp_temp); DataReading Temp; Temp.d = bmp_temp; Temp.id = TEMP_ID; Temp.t = 1; DataReading Pres; Pres.d = bmp_pressure; Pres.id = PRES_ID; Pres.t = 3; DataReading thePacket[2]; thePacket[0] = Temp; thePacket[1] = Pres; esp_now_send(broadcastAddress, (uint8_t *) &thePacket, sizeof(thePacket)); }