***Please note that the latest batch of boards have a GREEN silkscreen compared to the product pictures above. The functionality of the boards have not changed.

What is it?

This is an Open-Source Cellular board that would be a great platform to develop your internet of things (IoT) projects. It enables web connectivity for your ideas. The platform is tri-functional, and can be used like an Arduino, FTDI cable or for Cellular connectivity.

Features

• SimCom SIM800H cellular module.
• ATMEGA328AU microcontroller with Arduino bootloader
• Genuine FT232RL FTDI chip.
• Optional FTDI header to use the board as an FTDI cable only.
• On-board LiPo battery charger (MCP7383) to keep the battery supporting the SIM800H charged.
• On-board 5V LDO regulator (MIC5225) which allows powering the board with an external battery pack (VBAT pin). Input voltage up to 16V.
• All unused SIM800H pins broken out on the board in case user wants to add a microphone/speakers or FM radio. Please see the SIM800 hardware guide for additional feature details.
• Small prototyping area to attach sensors, etc.
• uFL antenna connector.
• Micro USB connector.

Why did you make it?

I needed an easy to use cellular platform for a project - something that had a microcontroller (Arduino-like), debugging capabilities and GPRS. Since there was nothing available, I decided to make one and share!

My primary goals for this platform were versatility and easy of use.

What makes it special?

ATmega328au + SIM800 + FTDI = Total IoT development awesomeness! The platform has the popular ATMEGA328AU microcontroller with the Arduino bootloader burnt-in. This allows anyone to use the Arduino IDE to program the device. Most of the ATMEGA328AU pins are broken out on a header in case the user needs to use them for sensors, etc. All Arduino sketches are compatible.

A Cellular Library is also provided to help you get started using the device. The library is based on the Adafruit FONA library.

The board can also be used as a FTDI cable by changing a couple of jumpers, and soldering the optional FTDI header.

SIM card

This platform has been tested with a US T-mobile 2G prepaid SIM card and it worked great. This product does NOT come with a SIM card.

What's included in the price?

• 1 x Cellstick cellular development platform.
• 1 x 6-post male header and jumpers.
• 1 x 23-post male header.

Optional Items

Please add the Slim Sticker-type GSM/Cellular Quad-Band Antenna 3dBi uFL to the order if required. The Cellstick does not ship with an antenna unless specifically ordered.

*Please note that a LiPo battery does NOT come with the Cellstick, and is needed to use the platform. You can pick one up at Adafruit. The battery is needed to satisfy the instantaneous current draw of the SIM800.

What else do I need to use the Cellstick?

• 3.7V JST LiPo battery with at least 500mAh capacity.
• 2G/3G SIM card that can register on a 2G cellular network.
• GSM/Cellular Antenna with a uFL connector (Add to the cart if needed).
• Micro USB cable