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Ships within 48 hours · Estimated delivery Aug 18 - Aug 23
Internally
Capacity: 3000mAh
but also can use the digital pin of Arduino to power on and reset the SIM900 module
2 pieces nRF24L01 wireless module
Material: ABS Plastic
RS-232 to TTL Converter (Industrial Standard) hc151 InternallyRS 232 to TTL converter (UT 210) converts data (TXD, RXD) of RS 232 to TTL signal. The TTL electrical level is 5V, without external power supply. It adopts unique "RS 232 charge pump" technology to drive the system and gains power without initializing the RS 232 serial port. The RS 232 to TTL converter has an automatic transmission and reception conversion with no delay. It has a unique I O circuit auto control data flow direction. With these, you
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