Hi, I am working on something where I have a Sonoff Basic in the Ceiling rose controlling my lights, I02 for light switch. I want to add a MCP23017 I2C Serial Interface to expand the GPIO’s as I want to add the below to have one unit that meets all my needs:
HC-SR501 Human Sensor
GY-BME280 Temperature Humidity Sensor
GY-302 BH1750 Light Intensity Illumination Sensor
I have watched a suggested video (https://www.youtube.com/watch?v=VixBNNKykIg&t=343s), I have flashed my Basic with the ‘tasmota_6307_1m_i2c_sensors.bin’ firmware, attached the 3.3v, gnd, GPIO to I2C SDA and GPIO3 to IC2 SCL and set that also in Module Parameters. Is a pull-up required, if so where?
At this point I am unsure of what to connect where in terms of the 3 sensors (Ultimately I want Home Assistant to control and use them, but for now it would be nice the the Basic to at least see them working).
Any help would be appreciated.
Many thanks,