Another development board for ESP8266-12F. But this one is a bit different, made to be easy to set up without the need for additional hardware like programmers and voltage regulators. A wide voltage range switching regulator enables the user to use different battery technologies from 1 AA cell up to LiPo cells. If you are using LiPo cells there is also a USB charger on the board. The ADC is connected to the battery with a voltage divider that you can turn off when not used to save power.
The board has been made as small as possible but still with a lot of functions and breadboard compatible.
Optimized for ultra low power and ease of use.
One of the smallest devboard for ESP8266.
Measure battery voltage through voltage divider with zero poweruse when not measuring.
All pins except G15, Reset and Chip Enable exposed on the pinheader to the user.
CP2104 usb to uart with auto-reset support for getting into bootload mode before firmware upload.
LiPo charging from USB.
Wide range supply voltage to work with many different battery configuration.
Exposed setting pins for TSP61201.
Deep sleep prewired, only need to connect with a solder jumper.
Micro-usb for power and uploading of code.
Battery voltage: 0.8-5.5V or USB powered.
TPS61201 3.3V boost converter with built in LDO for >3.3V capability.
LiPo charge current: 500mA (setable with change of resistor)