The motherboard with ESP8266 on the one side has a stack for 18650 Accu at the otherside. It is a Nodemcu module with pins for soldering. It is useable by WiFi within the local WLAN. Very good for learning purposes.
one excellent choice for a remote install with no access to power!
Works OK so far. Tested with a sketch to connect to Wifi and send a message to my MQTT Broker. Warning - Get the flat topped battery as the version with the nipple (+ve) is too long and will distort the board if you force it in.
no complaints
well build
ok
Work excellent, no problems at all.
Fast delivery awesome product 👍
Nice solution for beginers, put in battery and some sensors on board, load example skech for sensor and you have your 1st IoT device.
Ordered 5 units, arrived quickly. All are fully working and function as expected. 18650 battery holder fits nicely.