Could be the signal level is too low to receive an undamaged packet. Could be the received data is not a valid packet at all.
Best way to test is to obtain a node and try to send data
The ttnmapper data could have been obtained last year so your gateway had no chance of receiving it. However the antenna and its position inside a faraday like room will not help. If possible you could position the gateway outside (when it’s dry) for a couple of hours to see if that makes a difference.
I have been thinking what could interfere with 868MHz and I somehow wasn’t thinking of my Zwave devices for homeautomation, they also operate on ISM band
I need to extend my Ethernet cable to the garage away from my house, to check if I then can receive some good data packages from somebodies node
Has anyone programmed RAk831 with ESP8266 or other MCU? I want to deep understand about communicating SPI between RAk831 and raspberry pi. I reading Lora packet_forword but I have a problem when converting SPI of raspberry Pi to SPI of MCU.
hi BoRRoz. I use STM32 to connect RAK831. I want to know what did raspberry pi write/read into the address of RAk831 but I don’t know about SPI of Pi so some line in code I don’t clear.
Hi!
I don’t know why I am not able to send anything from my RAK831 Gateway to my RFM95 node using util_tx_test.c program (from https://github.com/Lora-net/lora_gateway) as plain LoRa packets. Nothing gets received on the node(using Radio Head library on node).
The log on the RAK831 is fine: Sending 10 packets on 868400000 Hz (BW 125 kHz, SF 7, CR 1, 16 bytes payload, 8 symbols preamble) at 14 dBm, with 100 ms between each
INFO: concentrator started, packet can be sent
Sending packet number 1 …INFO: tx_start_delay=1495 (1495.500000) - (1497, bw_delay=1.500000, notch_delay=0.000000)
OK
Things I checked:
Tested inverted modulation from gateway.
Changed SyncWord to 0x12 on end node and set loraWAN_public=false in the code.
matched frequency, CR, SF, BW, preamble.
I can send from the RFM95 node to the RAK831 gateway using util_pkt_logger without any problems. I also tried with another Dragino-gateway that could send to the end node without problems, so the end node is fine.
Hi
2 questions,
1
Has anyone got some pointers on how to change the packet forwarder to the TTN one on openwrt?
2
I keep getting “Failed to start concentrator”. About every 5th attempt does start it and then everything works ok. At the moment I am just testing the system and am using the leads that came with the system to join the MCU board to the Rak board. Could this be the cause? and if so are there any ways around this apart from using a PCB to link the two? I have already tried changing the SPI speed but it made no difference, although I might be changing it in the wrong place.
very useful… as for the pkt frd options, just finding lots of different repos is what I was getting after. (legacy udp seems the best right now?)
I already have a few pi’s doing spi… can’t I just add the RAK831 module to one of those? I’ll try node-red too, I was just using it to toggle the reset pin. pretty easy.