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ESP8266: Always call `uart_init` before `gpio_init`
I don’t remember if this information is in the documentation, but having spent a few hours to figure things out, I think it is important to record it here.… Read the rest.
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ESP8266 ESP-01(S) requires CH_PD set to HIGH
On the ESP8266 ESP-01, CH_PD must be pulled HIGH at boot for the chip to work. A 10K resistor can be used for the pull-up.… Read the rest.