Archives August 2015

Friday, 21st August 2015 - 20:16:32


eBay score - direct from China of course. Got a bunch of jumpers and also matching 2,3,4 and 5 way connectors.

Sunday, 16th August 2015 - 16:01:21


I bought a few of these cheap ESP8266-12 modules from eBay. I'm pretty impressed so far with how easy it is to get a simple web server up and running.

Key learnings:

  • The module has a number of IO pins which must have set state to run and another state to flash. GPIO0 needs to be tied low to flash.
  • Needs hundreds of mA - can't run from USB->RS232 converter power.
  • minicom (linux) doesn't send the required CRLF to the module. Have to manually use CTRL+M, CTRL+J
  • Needs to be flashed with NodeMCU firmware to use LUA
python --port /dev/ttyUSB0 write_flash 0x00000 ../Downloads/nodemcu_integer_0.9.6-dev_20150704.bin

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