i would like to share with community with info about some cool project which is using chip sx1280/81 to receive data over satellite.
It is hardware redesign, previously using Allwinner A20 and new design is based on esp32 or esp32S2.
Here is short description
This firmware runs on the Othernet Dreamcatcher satellite data receiver. The receiver's primary component's include the ESP32/ESP32-S2 from Espressif Systems, Semtech SX1281 LoRa transceiver, Texas Instruments TPS-65235 13V regulator, and Microchip MIC5353 3.3V regulator.
This firmware has been tested on both the ESP32 and ESP32-S2 wifi microntrollers. Due to high memory usage only wrover modules/boards will work (with SPIRAM). The Dreamcatcher 4 should be available for purchase in April of 2021.
This firmware is used to control the voltage to a standard, commercially-available satellite LNB. The LNB takes a 12 GHz signal and downconverts it to a range that can be received by the SX1281. The SX1281 demodulates the downconverted LoRa carrier and sends packets to the ESP32 over SPI. Downloaded packets are turned into files and stored on the microSD.
The ESP32 can create a wifi access point and also connect to an existing wifi network. By default, Dreamcatcher operates in access point (AP) mode. Changes to wifi settings can be made through the web interface. Configuration of the SX1281 (frequency, spreading factor, coding rate) is also done through the web interface.
https://github.com/Othernet-Project/Dreamcatcher
https://othernet.is/products/dreamcatcher-circuit-board