The HX1 is a low-power amateur radio transmitter set to a fixed frequency of 144.390 MHz. In North America, this frequency is used for the Automatic Packet Reporting System, or APRS.
APRS is a standard used by amateur-radio operators to broadcast live sensor data on a shared frequency. This data can be received by anyone with the proper equipment, and is aggregated on the internet through gateways run by members of the APRS community. APRS is commonly used to share real-time data including vehicle location (GPS), weather stations, high-altitude balloon tracking, remote sensor platforms, disaster relief coordination, and more. It’s effectively an open-source, open-data, community-run, free to use, IoT system with potentially worldwide coverage.
The HX1 is a 5V, low-power (300mW), narrowband (3kHz) VHF FM transmitter module. With a simple antenna, the range will be around 6 miles. Since this is a "bare" transmitter, the data input must be properly modulated and formatted. There are several Arduino software packages that can do this, see the hookup guide for information.
Note: Because it uses amateur radio frequencies, you will need an amateur radio license to use the HX1. It's easy (and fun!) to get one.
If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.
Skill Level: Experienced - You will require a firm understanding of programming, the programming toolchain, and may have to make decisions on programming software or language. You may need to decipher a proprietary or specialized communication protocol. A logic analyzer might be necessary.
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If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.
Skill Level: Competent - You will be required to reference a datasheet or schematic to know how to use a component. Your knowledge of a datasheet will only require basic features like power requirements, pinouts, or communications type. Also, you may need a power supply that?s greater than 12V or more than 1A worth of current.
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