GlobalSat’s LM-130 series modules are LoRaWAN certified. They are based on Semtech’s SX1276 chip. A quick way to evaluate its performance is to use the LM-130 EVB (Evaluation Board) priced at US$ 50 (about $75).
The manufacturer supplies the modules pre-configured to work with KotahiNet’s band. Ensure that this is requested at the time of purchasing them.
Connect the EVB to a PC using the serial to USB cable provided by the manufacturer and attached to the board as shown in the picture. It should set up automatically as a serial device. Use any serial terminal to connect. Settings are 57600 bps, 8 bits, no parity, 1 Stop bit, no flow control. All commands need to be terminated with <CR><LF> and any replies will also be terminated by the same sequence. Turn screen echo on.
1. The EVB comes with a rechargeable battery. It can be charged by connecting the USB port on the board with a cable to a PC or USB charger. Without adequate charge, it is not possible to set up the EVB using the supplied serial to USB cable.
2. Make sure the sliding switch located next to the battery connector is on.
// check firmware version
// check Device EUI
//check App EUI
//check App Key
//check Adaptive Data Rate is on (=1)
//check join mode is OTAA (=1)
//check number of re-transmissions for confirmed transactions if not acknowledged
//save any settings changed
//to join network, soft reset required
Send join request
send freq.866400000 DR0 counter 1(1318912 us)
RX freq.866400000 DR0 symTimeout 18
20 2C 93 AB 5E 45 2B 16 C2 A5 C1 43 1A 3D 0D D1 F7 62 EB 00 34 61 BD 03 94 CE 1C 82 A9 55 14 F6 57
20 40 07 30 54 52 4C 8B FE C9 A8 00 00 F0 2B 84 C0 33 84 90 3B 84 60 43 84 30 4B 84 00 B5 E5 F5 AD
//send test data, port 5, confirmed
Send data: ABCD
send freq.865000000 DR0 counter 1(1155072 us)
RX freq.865000000 DR0 symTimeout 9
60 8B FE C9 A8 A0 00 00 71 4E D6 C1
RSSI = -94,SNR = 7.25
//send another test data, port 6, unconfirmed
Send data: ABCDEF
send freq.867000000 DR0 counter 2(1155072 us)
RX freq.867000000 DR0 symTimeout 9
RX freq.867200000 DR0 symTimeout 9