Hi,
Many thanks for sharing the example file for I2C connection with MS51FB9AE as slave. I have an ESP8266ProMini running with ESPHOME firmware as I2C master. I have 3 devices connecting to the I2C bus (2 PCF8574 and the MS51 chip). MS51FB9AE connected to I2C on P0.6 (SDA), P0.7 (SCL). The chip and esp8266 and other powered by 3.3V. I tested the MS51 with blink code and worked as expected. I used KEIL to compile your provided code (using your Keil project) with modification on the GPIO to match with my current hardware connection.
However, at initial scanning of I2C devices, only the two PCF8574 are found at 0x20 and 0x38 address. the Ms51 chip is not found. The connection diagram is found in the image below.
.
Please be so kind to guide me with thanks.
Best,
Ngoc
Hi,
Many thanks for sharing the example file for I2C connection with MS51FB9AE as slave. I have an ESP8266ProMini running with ESPHOME firmware as I2C master. I have 3 devices connecting to the I2C bus (2 PCF8574 and the MS51 chip). MS51FB9AE connected to I2C on P0.6 (SDA), P0.7 (SCL). The chip and esp8266 and other powered by 3.3V. I tested the MS51 with blink code and worked as expected. I used KEIL to compile your provided code (using your Keil project) with modification on the GPIO to match with my current hardware connection.
However, at initial scanning of I2C devices, only the two PCF8574 are found at 0x20 and 0x38 address. the Ms51 chip is not found. The connection diagram is found in the image below.
Please be so kind to guide me with thanks.
Best,
Ngoc