ESP-12F DC 5V/12V/24V 16 Channel Relay Board (ESP12F_Relay_X16)
ESP-12F DC 5V/12V/24V 16 Channel

Available from:

Install method:
USB to Serial

GPIO #Component
GPIO00 User
GPIO01 User
GPIO02 User
GPIO03 User
GPIO04 User
GPIO05 Button_id 1
GPIO09 User
GPIO10 User
GPIO12 74x595 RCLK
GPIO13 74x595 SRCLK
GPIO14 74x595 SER
GPIO15 User
GPIO16 User
GPIO17 User

This device uses two 74HC595 serial registers to control the relays, which are not enabled in default builds. Therefore you need to compile your own Tasmota binary, enabling USE_SHIFT595 setting.

After configuring the template you need to go to the console and run Shift595DeviceCount 2 command to setup shift registers. After that the device will reboot and all 16 relays will be visible in WebUI.

IMPORTANT! Currently only the first 8 relays are available in autodiscovery MQTT topics.