Next problem: the Nano runs on 5V while the ESP32 runs on 3.3V. That means the ESP32 has to actively request that variable from the Nano. As the ESP32 uses several slaves already I suggest to define the Nano as a slave. So you have to define one MCU as the master. The Nano's Wire library isn't multi-master capable, I don't know if the ESP32 Wire library does implement that. Although is theoretically defined to be multi-master capable I have never seen a real system running reliably with such a setup. Serial.println(F("Failed to complete reading :(")) instantaneous even if milli() >= endTime due to I2C/SPI latency. Obtain measurement results from BME680. ReadAltitude = bme.readAltitude(SEALEVELPRESSURE_HPA) Gas_resistance = bme.gas_resistance / 1000.0 Pressure = (bme.pressure / 100.0) + correzione_pressione Temperature = bme.temperature - correzione_temperatura // fattore di correzione Serial.println("Failed to perform reading :(") Serial.print("x nella ricezione evento ") Set up oversampling and filter initializationīme.setTemperatureOversampling(BME680_OS_8X) īme.setHumidityOversampling(BME680_OS_2X) īme.setPressureOversampling(BME680_OS_4X) īme.setIIRFilterSize(BME680_FILTER_SIZE_3) īme.setGasHeater(320, 150) // 320*C for 150 ms Serial.println(F("Could not find a valid BME680 sensor, check wiring!")) Lcd.begin(20, 4) // // Inizializzazione Display LCD 20x4 Serial.begin(115200) // Inizializzazione Seriale Wire.begin((uint8_t)I2C_DEV_ADDR) // Inizializzazione I2c #include // Library for I2C communication I've already searched for a similar problem on the net, but haven't found anything for my case. Some idea? Should I use a different library? Are there any known issues with ESP 32 and the WIRE?
Through the serial line, only the variable x of the Loop is updated with the print of the zero previously assigned, but not updated by the receiveEvent(int howMany).
The instructions work perfectly between NANO and ESP 32 using only the WIRE and eliminating the use of other peripherals that use I2c NANO has to send data of a variable (x in my case) through I2cĮSP 32 must receive data with I2c using WIRE libraryĮSP 32 connected with I2c a 24x4 LCD displayĪll services with I2c work fine without WIRE libraryĪs soon as I insert this into the project, there is no transfer between the NANO and the ESP 32. Result I have no data transfer between the two processors LCD does not work and BME 680 is not recognized.
I have a little big problem in my project where I'm using different libraries that work great without conflicts with each other.īut now I have to transfer variables between a NANO and an ESP 32 38 pin using the WIRE library through I2c.
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