ESP8266 Programmer is a breakout board to upload firmware on ESP8266. It benefits of USB-C connector, the new de-facto standard on the market. It is designed to be attached to Lolin/Wemos D1 mini shield. If you are not going to use this form factor, you can break the external frame, gaining some mm^2 ([video](https://youtu.be/vi9zZSLOqzo)). Despite the name, it can be also used to program ESP32 and ESP32-S2. New version [here](https://easyeda.com/fabiano.riccardi/esp8266-programmer_copy). ## Main components - Serial-USB converter CH340C - A low dropout voltage regulator ME6211 (max 500mA) - 2 NPN digital transistors to control output pins embedded in UMH3N - USB-C connector for power supply and data ## Assembling This board is entirely solderable by hand, no need of stencil. You will need the hot air gun for the USB-C connector and UMH3N. ## Usage You just need to install the driver for the CH340C. ## Changelog - 1.0.0 ⚠: First version - 1.1.0 ❌: Resistor on RX 470 ohm to protect the line; modular form-factor Wemos D1 Mini; used 0805 package instead of 1206); micro USB -> USB-C; B5819W --> B5817W (lower forward threshold) - 1.2.0 ✅: fix Pd resistor on USB-C connector required to sink energy; LED red to indicate power on; Breakable PCB split in 2 parts, to ease breakability - 1.2.1 ✅: circles around pins to identify the one used in Lolin D1 mini form factor; minimum track width 0.2mm - 1.2.2 ❔: improved readability of schematic and PCB; removed 0603 -> 0805 package for resistors, capacitors and LEDS; minimum 0.8mm NPTH cut to match JLCPCB capabilities ### Versioning conventions Each printed board has a version in the format *x.y.z*. To quickly indentify the status of each version, I use emojis. The following list explains their meaning: - A *White Heavy Check Mark* (✅) means that it is successfully tested; - A *Negative Squared Cross Mark* (❎) means that it was almost successfully tested (the main functionalities are fine), but there are bugs affecting minor funcionalities; - A *Warning Sign* (⚠) means that the board is not usable out of the box but the bugs are fixable in DIY (decent) fashion; - A *Cross Mark* (❌) means that there are some problems that makes it unusable; - A *White Question Mark Ornament* (❔) means not tested.