When you want to flash your Shelly 2.5 with anything but the original firmware for the first time, you
The 954 cable is easiest way to connect to your microcontroller/Raspberry Pi/WiFi router serial console port or for programming your VEX Victor BB
USB to TTL Serial Cable - Debug / Console Cable for Victor BB / Raspberry P - Adafruit 954i
Flash Tasmota to your Shelly or Sonoff! Custom firmware for ESP8266 Devices!
Delock Products 84957 Delock Converter USB 2.0 male > TTL 6 Pin WR-WTB 2,2 m (3,3 V)
Shelly Plus Add-On
Shelly Blu Gateway - USB WiFi Gateway - Bluetooth Botland - Robotic Shop
• ElecPow 2.x
USB to Serial TTL V2 : 3 Steps - Instructables
Zehnder ComfoAir CA350 integration via serial connection (RS232) and MQTT - Share your Projects! - Home Assistant Community
Question about the Shelly 2.5 GPIO connector · Issue #5652 · arendst/Tasmota · GitHub
I have a great idea! I'll buy an RS-232 to USB adapter and a separate null-modem cable! Much more versatile. No way I'll lose one of them : r/homelab
How to Make a USB to TTL converter
Designed to be used for USB to TTL electronic projects, easy to connect to your MCU. Status LED for TX,RX CP2102 USB to TTL Transfer chip from Silicon Labs,Industrial chip, high quality, super stable.
DSD Tech USB to TTL Serial Converter CP2102 with 4 Pin Dupont Cable Compatible with Windows 7,8,10,Linux,Mac OSX
VoltLink CP2102N USB Serial Adapter & Programmer from Voltlog on Tindie
Question about the Shelly 2.5 GPIO connector · Issue #5652 · arendst/Tasmota · GitHub
Tasmota: Flashing and setup a Shelly 2.5