
In order to keep the circuit not draw over 1C current from the battery, it is recommended to choose a battery over 200 mAh. In my measure, this circuit sometime may draw over 200 mA. BatteryĪny LiPo battery a little bit smaller that the LCD should be ok. LCD DisplayĪny ili9341 LCD that can fit in the sweet box should be ok, I am using TM022HDH26 this time. Some can fit a 2.2 inch LCD and some bigger one can fit a 2.4 inch LCD with break out board. But beware it have many size, especially you bought it in different seasons and countries. Tic Tac is one of easy accessible transparent sweet box.

Sometime it may hit a channel that already very busy and transfer file very slow.

That means the signal substantially overlapped and interference degrade the network performance.

At my home and office, I can found over 20 AP SSID but 2.4 GHz only have 11 channels. WiFi everywhere now and 2.4 GHz is still most compatible frequency.WiFi Analyzer is very useful in some situations:
