Overview
The Inventory Master LoRa Wi-Fi module is crucial and must connect to the IPEX interface to prevent potential damage to the LoRa chip. The device includes a lithium battery charge and discharge circuit with a status indicator LED that stops when the battery is fully charged. When using the IO port for touch screen signal input, it’s essential to add a 100 nF pull-down capacitor to ensure stable signal reception.
Technical Specification
| Working Voltage | 1.8 V to 3.7 V |
| Acceptable Current | 10 mA to 14 mA |
| Transmit Current | 120 mA at +20 dBm, 90 mA at 17 dBm, 29 mA at 13 dBm |
| Operating Frequency | 868 MHz / 915 MHz |
| Transmit Power | 20 dBm |
| Receive Sensitivity | -139 dBm LoRa 62.5 KHz SF=12 146 bps -136 dBm LoRa 125 KHz SF=12 293 bps -118 dBm LoRa 125 KHz SF=6 9380 bps -123 dBm FSK 5 KHz 1.2 Kbps |
| Frequency Error | + / – 15 KHz |
| FIFO Space | 64 Bytes |
| Data Rate | 1.2 Kbps to 300 Kbps (FSK), 0.018 Kbps to 37.5 Kbps (LoRa) |
| Modulation Mode | FSK, GFSK, MSK, GMSK, LoRa TM, OOK |
| Interface Form | SPI |
| Sleep Current | 0.2 uA (SLEEP), 1.5 uA (IDLE) |
| Operating Temperature | 40 °F to 185 °F (-40 °C to 85 °C) |
| Antenna | SMA Antenna |
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