![]() ![]() When programming the ESP8266 using the Arduino IDE (see ESP8266-01 Wifi Shield) you sometimes (often) get an error messages in the Arduino IDE like esp_com open failed error: Failed to open COM33 error: espcomm_open failed error: espcomm_upload_mem failed ESP8266 Programming Tips (espcomm failed) GPIO6-GPIO11 also require special treatment as described below. ![]() These GPIO's control how the module starts up and as such require special handling if they are to be used at all. Most modules, other than ESP8266-01, also make GPIO15 accessible. All modules make GPIO0 and GPIO2 accessible. It comes in a variety of module types and can be programmed in a variety of ways. Update: Also check out How to use the ESP8266-01 pinsĪlso see ESP32 / ESP8266 Auto WiFi Config for Beginners for a simple way to connect your ESP to any local network, without re-programming.ĮSP8266 is a low cost wifi enabled chip. This is a very short note on how to use GPIO0 / GPIO2 and GPIO15 pins on the ESP8266 module. Updated 24th December 2021 – added note on preventing GOIO0 relay flicker on startup Update 1st July 2018 - Added note on re-programming when GPIO0 is an output
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |