RAK7200 GPS problem

LPWAN Nodes RAK7205 / RAK5205
1

First of all, this is my first touch on this LoRa technology and I have some issues. Maybe we all together solve this problem.

  1. When I hit reset button on device RAK7200, device lost appklication key. Serial port tool receiving this information “parameter is not found.” Is it normal?
  2. When I connect RAK7200 with STM32CubeProgrammer, I see Error: Address not acknowledged: 0x1FF8007C. Is it normal?
  3. The main, problem U cant see GPS coordinates. Serial port tool receiving:
    GPS Init OK
    Start Search Satellite(about 100 seconds) …
    FAIL.The Satellite signal not found!

I spend a lot of time searching for a fix, but no result, please help me. I updated firmware latest version.

Blockquote
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| ___ / _ \ | | / / | | | () | |
| |/ / /\ | |/ / | | | | _ __ | | ___ ___ ___
| /| _ || \ | |/| | | '/ _ \ |/ _ / __/ __|
| |\ | | | || |\ \ \ /\ / | | | __/ | /_ _
_| __| |/_| _/ / /||| _|_|_||//

RAK7200 version:3.1.0.11

========================================================
Please Configurate parameters within 30 seconds …
Configuration OK!
lorasend_interval: 60s
MPU9250 Init OK
GPS Init OK

Selected LoRaWAN 1.0.2 Region: EU868
Initialization OK,Current work_mode:LoRaWAN, join_mode:OTAA, Class: A
gps_timeout: 100s
OTAA Join Start…
[LoRa]:Joined Successed!
Start Search Satellite(about 100 seconds) …
FAIL.The Satellite signal not found!
Battery Voltage = 3.918 V
Acceleration(g) of X,Y,Z:
0.65,0.49,0.64
Gyro(degress/s) of X,Y,Z:
-64.22,64.22,92.93
Magnetometer(uT) of X,Y,Z:
72.60,45.45,18.75

[LoRa]: Send out <data_len:32bytes>
[LoRa]: Unconfirm data send OK
Go to Sleep
OK
Wake up .
GPS Init OK
Start Search Satellite(about 100 seconds) …

at+get_config=device:status
OK.

===============Device Status List================
Board Core: S76G_B
MCU: STM32L073RZ
LoRa chip: SX1276

Support Gps:true
gps_timeout: 100s
gps_format:standard LPP format
No signal with Satellite.

MPU9250 sensor:
Acceleration(g) of X,Y,Z:
0.02,0.98,0.00
Gyro(degress/s) of X,Y,Z:
0.83,2.28,0.54
Magnetometer(uT) of X,Y,Z:
95.10,55.35,2.40

===================List End======================

at+get_config=lora:status
OK.

==============LoRaWAN Status List================
Work Mode: LoRaWAN
Region: EU868
Send_interval: 60s
Auto send status: true.
Send_interval work at sleep
Join_mode: OTAA
DevEui: 60C5A8FFFE761D39
AppEui: 70B3D57ED0028AEE
AppKey: A91ADAC68680F2AD3F61E92E5FD963B5
Class: A
Joined Network:true
IsConfirm: false
AdrEnable: true
EnableRepeaterSupport: false
RX2_CHANNEL_FREQUENCY: 869525000, RX2_CHANNEL_DR:3
RX_WINDOW_DURATION: 3000ms
RECEIVE_DELAY_1: 1000ms
RECEIVE_DELAY_2: 2000ms
JOIN_ACCEPT_DELAY_1: 5000ms
JOIN_ACCEPT_DELAY_2: 6000ms
Current Datarate: 5
Primeval Datarate: 5
ChannelsTxPower: 0
UpLinkCounter: 1
DownLinkCounter: 0
===================List End======================

Blockquote

Gateway_rak7258
Gateway_rak72581138×914 49 KB

RAK7200
RAK72001178×867 52.9 KB

TTN
TTN1060×791 26.9 KB

2
  1. When you configure the three parameters, will APP_key be lost in the restart, or will this happen occasionally?
  2. When burning BootLoader, after successful connection, erase all contents and then reconnect, do you think this phenomenon will still occur?
  3. The GPS data is not read out because your GPS antenna has not found the satellite. You try to place it in an empty space and search again.
3
  1. It will happen occasionally, then I press reset button.
  2. Ok, i will repeat it later, but as i remember, nothing changes.
  3. Thanks, you are right. It means very weak, poor antenna, because device was placed near window.
4

Ok, let’s also find out as soon as possible about the occasional missing app_key