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Update readme. Fix #102

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Volodymyr Shymanskyy
2018-02-09 14:14:54 +02:00
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README.md
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@@ -126,22 +126,27 @@ For additional functions, please refer to [this example sketch](examples/AllFunc
## Troubleshooting
### Diagnostics sketch
Use this sketch to diagnose your SIM card and GPRS connection:
File -> Examples -> TynyGSM -> tools -> [Diagnostics](https://github.com/vshymanskyy/TinyGSM/blob/master/tools/Diagnostics/Diagnostics.ino)
### SoftwareSerial problems
When using ```SoftwareSerial``` (on Uno, Nano, etc), the speed **115200** may not work.
Try selecting **57600**, **38400**, or even lower - the one that works best for you.
Be sure to set correct TX/RX pins in the sketch. Please note that not every Arduino pin can serve as TX or RX pin.
**Read more about SoftSerial options and configuration [here](https://www.pjrc.com/teensy/td_libs_AltSoftSerial.html) and [here](https://www.arduino.cc/en/Reference/SoftwareSerial).**
### ESP32 HardwareSerial
When using ESP32 `HardwareSerial`, you may need to specify additional parameters to the `.begin()` call.
Please [refer to this comment](https://github.com/vshymanskyy/TinyGSM/issues/91#issuecomment-356024747).
### Diagnostics sketch
### SAMD21
Use this sketch to diagnose your SIM card and GPRS connection:
File -> Examples -> TynyGSM -> tools -> [Diagnostics](https://github.com/vshymanskyy/TinyGSM/blob/master/tools/Diagnostics/Diagnostics.ino)
When using SAMD21-based boards, you may need to use a sercom uart port instead of `Serial1`.
Please [refer to this comment](https://github.com/vshymanskyy/TinyGSM/issues/102#issuecomment-345548941).
### Broken initial configuration