Coap server on esp8266 esp-12 using bus-pirate as tool for flashing. steps: - Install picocom: sudo apt-get install picocom - Give permissons to tty sudo chmod 666 /dev/ttyUSB0: - Access bus pirate: picocom -b 115200 /dev/ttyUSB0 - Configure pirate as UART bridge (on images attached you can see a 3 steps image) * Hit m key HiZ>m * Select uart mode: 3. UART * Set serial port speed: (bps) 9. 115200 * set default data bits and parity: 1. 8, NONE *default * Set default stop bits: 1. 1 *default * Set default receive polarity: 1. Idle 1 *default * Select output type: 2. Normal (H=3.3V, L=GND) * Now you are on UART mode * Turn on power supply UART>W * Select transparent bridge UART>(1) - After this Follow the PCB diagram image attached, there is 2 modes flashing and boot. when s2 and s3 are set you can flash otherwise you can boot the device, also after each mode switch to set reset s4. next: follow github link. (still in progress)