PiTalk is an LTE HAT extension for Raspberry Pi, which reached its crowdfunding goal on the Kickstarter platform. The HAT is compatible with all Raspberry Pi SBCs except Compute Modules and Picos, and since it supports voice calls and text messages, gamers can use it to build their own smartphones.
PiTalk, developed by Ravinder Singh, an embedded systems engineer from London, UK, can continue to use the Raspberry Pi without Wi-Fi signal coverage. PiTalk is built around a Quectel EG25-G Cat 4 module with a maximum downlink speed of 150Mbps and a maximum uplink speed of 50 Mbps, and is backward compatible with earlier network types, also supports global positioning (GPS, GLONASS, BeiDou/Compass, Galileo and QZSS).
The Raspberry Pi using this HAT can not only make your own mobile phone, but also act as a Wi-Fi hotspot, a live broadcast device, or use it to surf the Internet. PiTalk can be used in digital signage to upload new content to signs without a Wi-Fi network or physical internet connection.
Singh is also working on a USB 4G dongle for Windows and Linux that connects via USB. All of his 4G products require a nano-SIM and rely on a USB port for power. PiTalk supports global shipments and is expected to begin delivery in February 2023.
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