PSF-B04 ESP8285 Programming Jig PSF-B01

thingiverse

Use 0.68mm pogo pins such as the [P50-J1](https://www.aliexpress.com/item/32924394571.html) and a clip to secure the jig over the module. You may have to use a 0.7mm PCB drill to be able to insert the pins, and perhaps a soldering iron to heat up the pins slightly so they fuse in place with the plastic. A 2.54mm pitch jumper (like those used on motherboard CMOS reset headers) can be used to pull GPIO0 to GND to enter flashing mode.