DIO on IO expander such as mcp23008 #734
martinpala
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Did anybody try to modify HAL library so it works with IO expander.
I'm not sure, if it's only me, but if you use I2C, UART and SPI with 2 DIO for lorawan with ESP8266, it is really complicated to have a safe operation - taking into account that some PINs on ESP8266 has limited usage.
Any ideas? I did some HAL modifications, but it never worked for me :(
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