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JAndrassy / ArduinoOTA

Arduino library to upload sketch over network to Arduino board with WiFi or Ethernet libraries
GNU Lesser General Public License v2.1
450 stars 91 forks source link

WiFi OTA upload to Mega works unreliably #134

Closed aryadas98 closed 2 years ago

aryadas98 commented 2 years ago

I have been trying to use this library for OTA upload to Arduino Mega using an attached ESP8266. For the ESP I am using a NodeMCU board. My hardware connection is as follows:

Arduino NodeMCU
5V 5V
GND GND
TX1 RX
RX1 TX

I have flashed the Optiboot bootloader from the my_boards package onto the Mega. After this, USB upload with Optiboot works. I have also flashed AT 2 firmware onto the NodeMCU. After this, the WiFiESPAT sketches work. I can connect to the internet and send and receive data. So next, I flashed the example SerialWiFiOTA sketch to the Mega using USB. A network port showed up. I tried flashing the same sketch again, but this time using OTA. Sometimes it works, sometimes it doesn't. The error is usually:

Connecting to board ... failed!
Error flashing the sketch

Sometimes it is:

Connecting to board ...  done
Uploading sketch ...  done
Flashing sketch ... Error flashing the sketch
aryadas98 commented 2 years ago

On a side note, my project mainly requires network comms and preferably OTA update. I am willing to switch to some other board or architecture, if it would be easier. So any suggestions are welcome.

JAndrassy commented 2 years ago

AT2 has a very bad performance and is unable to make larger transports in or out. Please use AT 1.7.5 from SDK 3.0.5

aryadas98 commented 2 years ago

Thank you, it fixed the problem. OTA upload now works reliably.