[SOLVED] LoRa receiver not working on Collar project

[ethicstechOSS]

Hi. I am evaluating the collar project. I ordered the Fabien Ferrero PCB from pcbway. Soldered the LoRa radio & Arduino Pro mini. I downloaded the gps program for collar project, https://github.com/CongducPham/LowCostLoRaGw/tree/master/Arduino/Arduino_LoRa_GPS Modified the CS pin into 10 for Arduino Pro Mino board and flashed the program. Everything was fine.

However, I got the error, "Unrecognized receiver..." from the serial monitor. I just used the same components of what you have been used. But I immediately understand that the PCB you used and the PCB I received is look like some differences, atleast on the appearance. I am comparing the collar document 10th page and attached my PCBs images. PFA. I am not sure this is the reason the LoRa module is not detected or something else. I dont have schematic for this PCB as well. Thanks for all your effort & this great project. Looking forward your help on this issue. I will also report to Fabien Ferrero.

TIA.

[ethicstechOSS]

Hi. I fixed the issue by adding the RST pin configuration in sx1272.h library for Arduino Pro Mini configuration,

if defined ARDUINO_AVR_PRO || defined ARDUINO_AVR_NANO || defined ARDUINO_AVR_MICRO || defined ARDUINO_AVR_MINI \

|| defined MK20DX256 || defined MKL26Z64

define SX1272_SS 10

undef SX1272_RST

define SX1272_RST 8

Then I got the following log,

Arduino Pro Mini detected ATmega328P detected SX1276 detected, starting SX1276 LF/HF calibration ... Setting Mode: state 0 Setting Channel: state 0 Setting Power: state 0 Setting node addr: state 0 SX1272 successfully configured Seting HIGH digital GPS power pin: 8

[CongducPham]

Yes, the new version is a bit different, just take as a reference the ANA pin of the RFM95 module which should be connected to the antenna.

[ethicstechOSS]

Hi. I confirmed that the Radio module 9th pin (antenna PIN ) connected with UCA antenna. However, on this PCB, I also understand that the antenna pin connected with GND as well. Should it be?.

My current output is, the lora module keep on sending its data, but unable to reach/find gateway.

[CongducPham]

Yes, solder the ground as well, it is better. Did you use PABOOST?

[ethicstechOSS]

Yes, I used PABOOST.

[ethicstechOSS]

Hi. Here I shared my log from Arduino Pro Mini and sending simple temperature data on this collar hardware setup for testing.

Arduino Pro Mini detected ATmega328P detected SX1276 detected, starting SX1276 LF/HF calibration ... Get back previous sx1272 config Using packet sequence number of 10 Setting Mode: state 0 Setting Channel: state 0 Setting Power: state 0 Setting node addr: state 0 SX1272 successfully configured Reading 240 Reading 222 Reading 213 Reading 207 Reading 200 Reading 195 Reading 188 Reading 185 Reading 176 Reading 175 Mean temp is 64.49 Sending !#1#TC/21.55567 Real payload size is 16 --> CAD duration 301

1

As you can see, the line, "Get back previous sx1272 config" and configured SX1272 instead of SX1276. I am not sure why it is configuring SX1272 instead of SX1276.

TIA.

[ethicstechOSS]

Hi. I solved the above issue by changing the mode to 4 (on both side) instead of 1 as per the issue, #54. But I am not sure why it is not working with mode 1.

[ethicstechOSS]

Now testing the GPS project.

• I did not used mosfet. Directly connected the battery.
• on the arduino Pro Mini, I can only use Mode 4 with gateway. On Mode 1, its failed to send the data and getting the above issue.
• I could not able to see the log properly when I connect both, FTDI USB & GPS sensor.
• On the gateway side, I downloaded the latest gw_full_latest, moved into lora_gateway and run lora_gateway with mode 4.

sudo ./lora_gateway --mode 4 SX1276 detected, starting. SX1276 LF/HF calibration ... ^$**Power ON: state 0 ^$Default sync word: 0x12 ^$LoRa mode 4 ^$Setting mode: state 0 ^$Channel CH_10_868: state 0 ^$Set LoRa power dBm to 14 ^$Power: state 0 ^$Get Preamble Length: state 0 ^$Preamble Length: 8 ^$LoRa addr 1: state 0 ^$SX1272/76 configured as LR-BS. Waiting RF input for transparent RF-serial bridge ^$Low-level gw status ON

I am not sure If I missed anything to run collar project properly. Any kind of help appreciated.

TIA.

[CongducPham]

Without the Mosfet, the GPS module will drain a lot of energy.

As I said, the Pro Mini has only one serial port so connecting the GPS will not allow serial monitor and logs to appear correctly, it may also affect the GPS.

I don't know neither why there is such an issue with mode 1.

Keep me informed. regards,

[ethicstechOSS]

Thanks for your input. Let me use MOSFET, give a try and get back to you. But still I failed to receive any communication (without GPS data) from the node on the gateway.