Adding GSM GPRS conectivity to ArduFarmBot 2 NodeMCU

[PeteKnight]

@MerlynMetal

I learned that GPIO9 and 10 are not usable unless the ESP8266 is flashed in DIO mode and that will effectively free only of them to be used as I/O pin. Is that an option?

I’ve never heard of this, as far as I’m concerned they are reserved pins, but they do seemed to be used for buttons in the sketch.

You should probably read this:

ESP8266 GPIO pins info, restrictions and features

hi blynkers! the esp8266 mcu is widely used in iot projects. however, most gpio pins on this mcu have special / multiple functionality and are not safe to use in all circumstances. these “features” are still not well documented and not explained in a friendly manner for newbies. i see lots of cases when the “issues” are simply caused by not knowing which pins to use in which case. [esp8266 pin features] here is a basic table for startup. i’ve collected the info from various sources on the i…

@MerlynMetal

Since I’m new in this field I would prefer to keep it simple for now.

You’re actually making it more complicated by sticking with the ESP8266 rather than the ESP32.

Pete.