Block Diagram

D
C
B
A
1 2 3 4 5 6
A
B
C
D
654321
MCU
3.3V
LDO
SG2457CC3TR33
Input DC 5V/ 1.2A
BAT 3*1.5V AA
WIFI MODE
ESP32- WROOM- 32DC
Bidirectional RF RECEIVE
RFM300- 433S2
433Mhz
2.4G
26M
RTC