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I can't be the first person trying to have an ESP32 act as an i2c slave using something other than the default pins.There’s an add-on for the Arduino IDE that allows you to program the ESP32 using the Arduino IDE and its programming language. I have tried this (this being redefining SDA and SCL) using both Arduino IDE 1.8.19 and Arduino IDE 2.0.0.rc5 Note I am running Expressif's ESP32 libraries v2.0.2 (ESP32 Libraries 1.0.6 and prior did not support ESP32 as a slave)
I have tried re-defining SDA and SCL but that does not seem to work Wire1.onRequest(WriteToI2CBus2Event) // register event for when master on i2c bus 2 wants to readĪs far as I can tell there is no way to use either Wire or TwoWire to create a peripheral on a custom set of pins. Wire1.onReceive(receiveI2CBus2Event) // register event for when master on i2c bus 2 writes Wire.onRequest(WriteToI2CBus1Event) // register event for when master1 wants on i2c bus 2 wants to read Wire.onReceive(receiveI2CBus1Event) // register event for when master on i2c bus 1 writes Wire1.begin(SDA2,SCL2,SLAVE_ADDRESS_ON_BUS_2) // Join I2C bus 2 using pins 21 and 22 Wire.begin(SDA1,SCL1,SLAVE_ADDRESS_ON_BUS_1) // Join I2C bus 1 using pins 2 and 15 What I really want to do is something like this: #include I find lots of documentation about setting custom pins, multiple busses using Wire or TwoWire. I can easily set up I2C as a MASTER on those pins, works just fine using Wire.begin(2,15). I'm using pin 2 as SDA and pin 15 as SDL. So I have to set up I2c on different pins. On this particular ESP32-WROVER board the default SDA and SCL pins are used by a camera. On an ESP32 (ESP32-WROVER from Freenove) I am trying to communicate with 2 devices that are I2C masters (Adafruit Monster M4sk) Tl dr can someone tell me if it is possible to set custom pins for an I2C slave (client, peripheral) within the Arduino environment?
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