Upgrading Sonoff Stock Firmware to Sonoff-Tasmota - USB to Serial, and OTA Update Methods - CNX Software
Ft232rl Ft232 Usb To Ttl 5v 3.3v Download Cable To Serial Adapter Module Usb To 232 Gy232v2 Micro Ft232rl Usb - Integrated Circuits - AliExpress
Hacking a Sonoff Basic Smart Switch — HackSpace magazine
Flashing Tasmota onto Sonoff Basic - Moloko's Blog
Flash a Sonoff Basic with Tasmota Using Tasmotizer (Easy! No Soldering!) - YouTube
Sonoff WiFi Smart Switch With I2C Port – JackenHack
Sonoff Basic - Tasmota
Sonoff Basic R2 + Tasmota (no solder)
Troy Hunt on Twitter: "Need some debug help with Sonoff SV and Tasmotizer: boards seem to be wired up properly, serial converter LED comes on, Sonoff is powered on with reflash button
Flashing the Sonoff TH16 Wireless Switch — REDELIJKHEID
New product: Sonoff Programming Adapter – SuperHouse Automation