I am using a GSM module sim800. My module responds to the output given by my PIR sensor and sends sms according to it. My module has got +5V, GND, Rx and Tx pins. What are the pin connections that I have to make?
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my INFINIX x510 isn't reconginz the USB cable – horlas Dec 14 '17 at 20:36
My module has got +5V, GND, Rx and Tx pins. What are the pin connections that I have to make?
TX => RX, RX => TX, that is Arduino TX to module RX, and TX to module RX. If you want to use Serial the pins are 0 for Arduino RX, and 1 for Arduino TX.
If you want to use SoftwareSerial you decide which pins to use (check the documentation for valid pins on your board).
// Use software serial with pin 2 for rx and pin 3 for tx
SoftwareSerial gsm(2,3);
Cheers!
answered Feb 1 '16 at 10:41
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when I use software serial an error pops up during uploading: 'SoftwareSerial' does not name a type. – HDatta Feb 1 '16 at 11:48
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#include <SoftwareSerial.h>, arduino.cc/en/Tutorial/SoftwareSerialExample – Mikael Patel Feb 1 '16 at 12:05
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You have a choice.
Always:
- GND => GND
- +5V => +5V
Then, either:
- TX => RX (0)
- RX => TX (1)
and use the hardware UART "Serial", but that then means that uploading new code to your Arduino becomes an arduous task since the usage pins 0 and 1 will interfere with that. So the other option:
- TX => Any pin
- RX => Any pin
And then use SoftwareSerial to set up a secondary "bit banged" serial port on the two pins you choose.
