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- A small Arduino library for GSM modules, that just works.
- <!---
- [](https://github.com/vshymanskyy/TinyGSM/releases/latest)--->
- [](https://github.com/vshymanskyy/TinyGSM/releases/latest)
- [](https://travis-ci.org/vshymanskyy/TinyGSM)
- [](https://github.com/vshymanskyy/TinyGSM/issues)
- [](https://github.com/vshymanskyy/TinyGSM/wiki)
- [](https://github.com/vshymanskyy/TinyGSM/stargazers)
- [](https://github.com/vshymanskyy/TinyGSM/blob/master/LICENSE)
-
- If you like **TinyGSM** - give it a star, or fork it and contribute!
- [](https://github.com/vshymanskyy/TinyGSM/stargazers)
- [](https://github.com/vshymanskyy/TinyGSM/network)
-
- You can also join our chat:
- [](https://gitter.im/tinygsm)
-
- ### Arduino Client interface support
- This library is easy to integrate with lots of sketches, which use Ethernet or WiFi.
- **PubSubClient ([MQTT](http://mqtt.org/))**, **[Blynk](http://blynk.cc)**, **HTTP Client** and **File Download** examples are provided.
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- 
-
- ### TinyGSM is tiny
- The complete WebClient example for Arduino Uno (via Software Serial) takes little resources:
- ```
- Sketch uses 15022 bytes (46%) of program storage space. Maximum is 32256 bytes.
- Global variables use 574 bytes (28%) of dynamic memory, leaving 1474 bytes for local variables. Maximum is 2048 bytes.
- ```
- Arduino GSM library uses 15868 bytes (49%) of Flash and 1113 bytes (54%) of RAM in a similar scenario.
- TinyGSM also pulls data gently from the modem (whenever possible), so it can operate on very little RAM.
- **Now, you have more space for your experiments.**
-
- ## Features
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- Feature \ Modem | SIM8xx | U201 | A6/A7/A20 | M590 | ESP8266 | XBee
- --- | --- | --- | --- | --- | --- | ---
- **Data connections**
- TCP (HTTP, MQTT, Blynk, ...) | ✔ | ✔ | ✔ | ✔ | ✔ | ✔
- UDP | ◌ | ◌ | | | | ◌
- SSL/TLS (HTTPS) | ✔¹ | ✔ | 🅧 | 🅧 | ✔¹ | ✔¹
- **USSD**
- Sending USSD requests | ✔ | | ✔ | ✔ | 🅧 |
- Decoding 7,8,16-bit response | ✔ | | ✔ | ✔ | 🅧 |
- **SMS**
- Sending | ✔ | | ✔ | ✔ | 🅧 | ✔
- Sending Unicode | ✔ | | ◌ | 🅧 | 🅧 |
- Reading | | | | | 🅧 |
- Incoming message event | | | | ? | 🅧 |
- **Calls**
- Dial, hangup | ✔ | | ✔ | 🅧 | 🅧 | 🅧
- Receiving calls | ✔ | | ✔ | 🅧 | 🅧 | 🅧
- Incoming event (RING) | ◌ | | ◌ | 🅧 | 🅧 | 🅧
- DTMF sending | ✔ | | ✔ | 🅧 | 🅧 | 🅧
- DTMF decoding | ◌ | | 🅧 | 🅧 | 🅧 | 🅧
- **Location**
- GSM location service | ✔ | ✔ | 🅧 | 🅧 | 🅧 | ✔
- GPS/GNSS | ✔¹ | 🅧 | ◌¹ | 🅧 | 🅧 | 🅧
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- ✔ - implemented ◌ - planned 🅧 - not available on this modem
- ¹ - only some device models or firmware revisions have this feature (SIM8xx R14.18, A7, etc.)
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- ## Supported modems
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- - SIMCom SIM800 series (SIM800A, SIM800C, SIM800L, SIM800H, SIM808, SIM868)
- - SIMCom SIM900 series (SIM900A, SIM900D, SIM908, SIM968)
- - AI-Thinker A6, A6C, A7, A20
- - U-blox SARA U201 (*alpha*)
- - ESP8266 (AT commands interface, similar to GSM modems)
- - Digi XBee WiFi and Cellular (using XBee command mode)
- - Neoway M590
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- ### Supported boards/modules
- - Arduino MKR GSM 1400 (*alpha*)
- - GPRSbee
- - Microduino GSM
- - Adafruit FONA (Mini Cellular GSM Breakout)
- - Adafruit FONA 800/808 Shield
- - Industruino GSM
- - ... other modules, based on supported modems
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- More modems may be supported later:
- - [ ] Quectel M10, M95, UG95
- - [ ] SIMCom SIM5320, SIM5360, SIM5216, SIM7xxx
- - [ ] Telit GL865
- - [ ] ZTE MG2639
- - [ ] Hi-Link HLK-RM04
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- Watch this repo for new updates! And of course, contributions are welcome ;)
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- ## Donation
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- [](https://salt.bountysource.com/checkout/amount?team=tinygsm-dev)
- [](http://tny.im/aen)
-
- If you have found TinyGSM to be useful in your work, research or company, please consider making a donation to the project commensurate with your resources. Any amount helps!
- **All donations will be used strictly to fund the development of TinyGSM:**
- - Covering cellular network expences
- - Buying new hardware and modems for integration
- - Bounty Budget (to reward other developers for their contributions)
- - Implementing new features
- - Quality Assurance
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- ## Getting Started
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- 1. Using your phone:
- - 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](https://github.com/vshymanskyy/TinyGSM/wiki/Powering-GSM-module) (up to 2A and specific voltage according to your module documentation)
- 4. Check if serial connection is working (Hardware Serial is recommended)
- Send an ```AT``` command using [this sketch](tools/AT_Debug/AT_Debug.ino)
- 5. Check if GSM antenna is attached
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- ## How does it work?
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- Many GSM modems, WiFi and radio modules can be controlled by sending AT commands over Serial.
- TinyGSM knows which commands to send, and how to handle AT responses, and wraps that into standard Arduino Client interface.
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- ## API Reference
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- For GPRS data streams, this library provides the standard [Arduino Client](https://www.arduino.cc/en/Reference/ClientConstructor) interface.
- For additional functions, please refer to [this example sketch](examples/AllFunctions/AllFunctions.ino)
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- ## Troubleshooting
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- ### Diagnostics sketch
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- 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)
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- ### SoftwareSerial problems
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- 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).**
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- ### ESP32 HardwareSerial
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- 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).
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- ### SAMD21
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- 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).
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- ### Broken initial configuration
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- Sometimes (especially if you played with AT comands), your module configuration may become invalid.
- This may result in problems such as:
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- * Can't connect to the GPRS network
- * Can't connect to the server
- * Sent/recieved data contains invalid bytes
- * etc.
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- 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)
-
- __________
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- ### License
- This project is released under
- The GNU Lesser General Public License (LGPL-3.0)
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