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To digital components and interconnects between middle and bottom boards. Final work on PCB Added input resistor for sync; placed everything on PCB with on-board antenna Class 2 Bluetooth Module without antenna Low-Power Long Range Transceiver Module Low Power Long Range LoRa Transceiver Module rf module lora lorawan Multiprotocol radio SoC module https://www.raytac.com/download/index.php?index_id=43 wireless 2.4 GHz Wi-Fi and Bluetooth module, https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf 2.4 GHz Wi-Fi and Bluetooth combo chip, external antenna, https://www.espressif.com/sites/default/files/documentation/esp32-s3-mini-1_mini-1u_datasheet_en.pdf 2.4 GHz Wi-Fi Bluetooth external antenna espressif 15.4*15.4mm ESP32-S2-WROVER(-I) 2.4 GHz Wi-Fi and Bluetooth module Single 2.4 GHz Wi-Fi and Bluetooth combo chip with U.FL connector, https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32d_esp32-wroom-32u_datasheet_en.pdf D52M ANT SoC Module https://www.thisisant.com/assets/resources/D00001687_D52_Module_Datasheet.v.2.3_(Garmin).pdf RF SoC Radio ANT Bluetooth BLE D52 nRF52 Garmin Canada Dynastream Nordic Low Power Long Range Transceiver Module THT-16 (https://www.hoperf.com/data/upload/portal/20181127/5bfcbea20e9ef.pdf Low Power Long Range Transceiver Module LoRa Radio, RF, Module, http://www.hoperf.com/upload/rf/RFM69HW-V1.3.pdf 8 pin SIM connector for 2.4mm PCB's with 50 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 30 contacts (not polarized Highspeed card edge connector for PCB's with 20 contacts (polarized Highspeed card edge connector for PCB's with 70 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 70 contacts (not polarized Highspeed card edge connector for PCB's with 40 contacts (polarized Highspeed card edge connector for PCB's with 08 contacts (polarized Highspeed card edge connector for PCB's with 30 contacts (not polarized Highspeed card edge connector for PCB's with 08 contacts (polarized Highspeed card edge connector for 2.4mm PCB's with 05 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 60 contacts (not polarized Highspeed card edge connector for 2.4mm PCB's with 50 contacts (polarized conn samtec card-edge high-speed Highspeed card edge connector for 1.6mm PCB's with 05 contacts (polarized Highspeed card edge connector for 1.6mm PCB's with 30 contacts (not polarized Highspeed card edge connector for IQRF TR-x2DA(T) modules, http://iqrf.org/weben/downloads.php?id=104 Bluetooth v4.2 + NFC module Modtronix Wireless SX1276 LoRa Module (http://modtronix.com/img/prod/imod/inair9/inair_dimensions.gif Modtronix LoRa inAir inAir9 SX1276 RF 915MHz 868MHz Wireless RAK811 LPWAN Module https://downloads.rakwireless.com/LoRa/RAK811/Hardware_Specification/RAK811_LoRa_Module_Datasheet_V1.4.pdf RAK4200 LPWAN Module https://downloads.rakwireless.com/LoRa/RAK4200/Hardware-Specification/RAK4200_Module_Specifications_V1.4.pdf Class 2 Bluetooth Module without antenna Low-Power Long Range Transceiver Module THT-16 (https://www.hoperf.com/data/upload/portal/20181127/5bfcbea20e9ef.pdf Low Power Long Range LoRa Transceiver Module LoRa Radio, RF, Module, http://www.hoperf.com/upload/rf/RFM69HW-V1.3.pdf 8 pin SIM connector for 2.4mm PCB's with 20 contacts (polarized Highspeed card edge card connector socket for 1.57mm PCBs.

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