Update README.md

This commit is contained in:
Volodymyr Shymanskyy
2016-12-01 15:39:58 +02:00
committed by GitHub
parent 0019157eb6
commit 3aa85e2f1c

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@@ -16,13 +16,25 @@ More modules may be supported later.
- Disable PIN code on the SIM card
- Check your ballance
- Check that APN,User,Pass are correct and you have internet
2. Ensure the sim card is correctly inserted into the module
3. Provide a good, stable power supply (up to 2A)
(4.0-4.2V or 5V according to your module documentation)
2. Ensure the SIM card is correctly inserted into the module
3. Provide a good, stable power supply (up to 2A, 4.0-4.2V or 5V according to your module documentation)
4. Provide good, stable serial connection
(Hardware Serial is recommended)
5. Check if GSM antenna is attached
## Troubleshooting
Sometimes (especially if you played with AT comands), your module configuration may become invalid.
In this case, there may be different problems:
* Can't connect to the GPRS network
* Can't connect to the server
* Sent/recieved data contains invalid bytes
* etc.
To return module to **Factory Defaults**, use this sketch:
File -> Examples -> TynyGSM -> tools -> [FactoryReset](https://github.com/vshymanskyy/TinyGSM/blob/master/tools/FactoryReset/FactoryReset.ino)
__________
### License