RP2040 LoRa 통신 보드 -RFM95W, 868MHz
(Challenger RP2040 LoRa (868MHz))
개요
- 본 제품은 RP2040 LoRa 통신 보드 -RFM95W, 868MHz입니다.
- 아두이노/CircuitPython 개발환경의 피더 보드 포맷의 마이크로컨트롤러 보드로 RP2040 칩 및 RFM95W LoRa 칩을 장착하고 있습니다.
- 868MHz 버전으로 장거리 통신이 가능합니다.
특징
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LoRa
The integrated module LoRa module, RFM95W, can achieve a sensitivity of over -148dBm utilizing a low cost crystal and bill of materials. The high sensitivity combined with the integrated +20 dBm power amplifier yields industry leading link budget making it optimal for any application requiring range or robustness. LoRa also provides significant advantages in both blocking and selectivity over conventional modulation techniques, solving the traditional design compromise between range, interference immunity and energy consumption.
The RFM95W is connected to the RP2040 via SPI channel 1 and a few GPIO's that is required for signaling. A U.FL connector is used to attach your LoRa antenna to the board.
- 168 dB maximum link budget.
- +20 dBm – 100 mW constant RF output vs. V supply.
- +14 dBm high efficiency PA.
- Programmable bit rate up to 300 kbps.
- High sensitivity: down to -148 dBm.
- Bullet-proof front end: IIP3 = -12.5 dBm.
- Excellent blocking immunity.
- Low RX current of 10.3 mA, 200 nA register retention.
- Fully integrated synthesizer with a resolution of 61 Hz.
- FSK, GFSK, MSK, GMSK, LoRaTM and OOK modulation.
- Built-in bit synchronizer for clock recovery.
- Preamble detection.
- 127 dB Dynamic Range RSSI.
- Automatic RF Sense and CAD with ultra-fast AFC.
- Packet engine up to 256 bytes with CRC.
We support both 868MHz and 915MHz systems by using the specific LoRa module (RFM95W-868S2, RFM95W-915S2) as required for each region.
LiPo battery / charger
The board is equipped with a standard 2.0mm JST connector for connecting a rechargeable LiPo battery. There is also an internal battery charger circuit that charges your battery as long as a USB cable is inserted or the VUSB connection is connected to 5V.
USB Type C
In the recent years we have noticed that we are seeing more and more USB Type C cable laying around the lab due to the fact that all new phones and accessories use them. As of yet we haven't seen any shortage of micro USB cables but we are not getting any new ones any more and old ones do break occasionally. So we decided to go for a USB Type C connector for this board. A bonus of this is that they are quite bit more durable and you don't have to fiddle with the cable before plugging it in.
문서
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Using the Arduino environment
We've teamed up with Earle F. Philhower over at his Github page to provide Arduino support for our RP2040 based boards. You can follow the instructions on Earle's github page or you can check out our instructions here on how to install the package.
Circuitpython
The Challenger RP2040 WiFi board is fully compatible Adafruits CircuitPython. Instruction are available on how to install the python interpreter of your choice is available on respective web site.
- Setting up TTN to receive messages from the Challenger RP2040 LoRa
- Configuring and setting up an Arduino application for TTN
- Using Circuitpython on the Challenger RP2040 LoRa to send and receive data packets.
- Datasheet
- Design files
연관제품
- 연관제품 1