The room sensor boards do not contain program or reset button, nor TTL headers. To flash a new ESP8266-201 it first needs to be placed into a development board. This can either be a breadboard circuit, a dev board constructed on stripboard or the Chinese ESP 201 "SDK".
Details of the board and a schematic.
The CH340G USB-TTL serial chip drivers for OSX can be found here. Once installed a new tty device should appear:
/dev/tty.wchusbserial1410
Flashing boards:
- Connect the board to your Mac
- Turn off the board using S1
- Make sure all DIP switches are off
- Switch on DIPs 7 + 8 (K1 + K2)
- Power on the board
- Compile and upload the sketch
- Turn off DIPs 7 + 8