This tutorial will instruct how to troubleshoot some common errors when using Easy LoRaWAN Cloud.
- Issue: There is uplink from LoRaWAN device but there is no new telemetry values in Easy LoRaWAN Portal.
- Easy LoRaWAN UI: https://ui.easylorawan.com
- Easy LoRaWAN Server: https://lorawan.easylorawan.com
1. Check for errors in UI Server
Step 1.1: In UI Server, go to Devices > Attributes > Client Atributes and check for lastlog_### attributes.
2. Check for errors in AWS Server
Step 2.1: Go to AWS Server > Applications > Devices > Choose the corresponding device > Events
- To look for log events.
- To click for the arrow of the log event to see the detail error.
Step 2.2: To check for detail error, some common errors are below:
- “json: unsupported value: NaN“: There is some invalid NaN or null value in the uplink. Please check the uplink data or decoder function of the corresponding device-profile.
- “js vm error…“: The decoder function is not defined or has invalid Javascript commands. Please check the format or the decoder function of the corresponding device-profile.
Step 2.3: To check if there is compilation error of the Javascript function in the device-profile of the device.
- If yes, please correct the Javascript error.
3. To manually decode uplink for debugging purpose
Step 3.1: To decode the uplink data for debugging purpose
- To click on an uplink just after the log event.
- To check for data field. The data is displayed in Base64.
- The object field is empty due to error in the decoder function.
Step 3.2: You can decode the data field into meaningful value if you know the correct format of your own data
- If uplink data is in text/json, use this link to decode
https://base64.guru/converter/decode/text - If uplink data is in hex, use this link to decode
https://base64.guru/converter/decode/hex
A sample decode from Base64 to text:
A sample decode from Base64 to Hex:
You need to fix the decoder function in Step 3a and/or uplink data in Step 3b in order to make the data uploaded into Easy LoRaWAN Portal.
- The required output of the decoder function MUST be a valid JSON data.
Done.
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