This is the PCB I built to be used with the Zmodem project
This boards uses an ESP8266 in the form of an ESP-12E/F module along with some simple parts to act as a modem/wifi bridge. It was initially built to be used with this Zmodem project. https://github.com/bozimmerman/Zimodem
3D printable case available here https://www.thingiverse.com/thing:4876405
*All caps and resistors are 0805/2012
| Label | Part |
|---|---|
| C1, C2 | 10uF Capacitor |
| C3 - C7 | .1uF Capacitor |
| D1 | 0805 LED |
| J1 | USB Micro-B socket |
| J2 | 9 Pin Female DSUB 4.94mm Edge Pin Offset |
| J3 | 02x06 Pin Header |
| R1 | 470 Ohm Resistor |
| R2 - R5 | 1K Ohm Resistor |
| SW1, SW2 | Push Button Right Angle |
| U1 | NCP1117ST33T3G |
| U2 | MAX3232 |
| U3 | ESP-12E/F Module |