2 layers90.6 × 45.9 mm

Boards in 1 GitHub repository, designed in KiCad, that use the CC2570RHAT by Texas Instruments (-40℃~+85℃ -86dBm 1Mbps 2.4GHz 23.7mA 25.9mA 2V~3.6V 4dBm ISM SPI、UART QFN-40-EP(6x6) RF Transceiver ICs ROHS). See how each wires it, with its parts, size, README and files; the CC2570RHAT’s symbol, footprint and pinout are on its own page.
