ESP8266 Community Forum

- Sat Mar 12, 2016 5:43 am #42940 This had me fooled for a while yesterday

Note that the NodeMCU serial interface uses 115200bps at boot time.

I'd just got a new Custom build from the Dev branch and hadn't realised that the NodeMCU team had finally got round to having a more sensible default baudrate. 9600 was so 1980's

I don't actually know of any reason not to run at 921600 - 1Mbit/s isn't that unusual in other serial devices. For NodeMCU boards with onboard USB<>RS232 chips the only unbalanced RS232 signal path is a few mm of PCB trace - and anyway, I use it all the time in ESPlorer even with a FTDI cable where the 921600 is rattling down a meter of multicore cable.

- Sun Mar 13, 2016 4:05 pm #43044 We've got to get something right occasionally You can easily change this higher if you do your own Docker build. 115200 is a trade-off: it is a lot better that 9600 and solid on all current USB-UART chipsets, but feel free to spin this up as high as your dev system will support.

Please see my Developer FAQ for Q&A on nodeMCU Lua before asking a question here that's already been answered. This and the other official documentation should be your first reference for developing Lua Apps

- Sun Mar 13, 2016 7:11 pm #43050 Too bad you can't change the buffer size of the serial buffers!

- Mon Mar 14, 2016 5:21 pm #43147 Sorry xtal, they are implemented in H/W so it's a chip limitation.

Please see my Developer FAQ for Q&A on nodeMCU Lua before asking a question here that's already been answered. This and the other official documentation should be your first reference for developing Lua Apps