I regularly get the following error esp.emac: emac_esp32_transmit(229): insufficient TX buffer size I have googled this and most suggest I increase either the TX Buffer Size or the Number of TX Buffers but nowhere can I find HOW to do this - can you help ? I am using the Ardunio IDE to program an es...

Output from compile in verbose mode ... C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine -hardware C:\Program Files (x86)\Arduino\hardware -hardware C:\Users\Test Engineer\AppData\Local\Arduino15\packages -tools C:\Program Files (x86)\Arduino\tools-builder -tools C:\Program...

I have installed aurduino ide 1.8.18 on a windows 11 machine. I can run the ide ok but when I try to compile or verify a sketch I get a big blue box which says "THIS APP CAN'T RUN ON YOUR PC" To find a version for your PC, check with the software publisher I have tried running as administrator and a...

Is it possible to put the esp32 into download mode from a sketch rather than by pressing the buttons ?

Change TX_PIN from 12 to 15 and that seems to have done the trick.
Thanks for you help

The pin set up is as follows :-

#define SIM800_RX_PIN 13
#define SIM800_TX_PIN 12
#define SIM800_RST_PIN 14

I'm not sure if this might also be a clue, but when I try to upload sketches it will only work if the GSM module is not connected.
When it is connected I get the following message :- A fatal error occurred: MD5 of file does not match data in flash!

Possibly, however the unit is being powered by a separate power supply. The input voltage is 11+

I am using an ESP32 with a connected GSM (SIM800L) module. I use FATFS to manage the on board files. When the GSM unit is not connected it can read and write data without a problem When the GSM unit is connected it reads but the write does not happen. There are no error codes returned but no data is...