No longer seeing data from sim800l and pic18f4525

I have a sim800l v2 and a pic18f. It was sending data to thinspeak last year uisng gprs and http post.

I have not changed anything but it seems to stop working. Has something changed on the thingspeak end?

Answer 1

[Christopher Stapels]

No change in the API. My guess is connectivity. Try moving the device to a new location.

[jp Valeo]

I have the same problem with 3 devices located in 3 different cities. The last entry in the 3 devices was at 2:15am on May 9 2024.

Additional information:

• The devices are composed by 1 Arduino Nano and 1 SIM808 GPRS Módule
• I have a free license and its expiration date is December 28 2024
• These devices worked well for 2 years, until May 09 2024

[Christopher Stapels]

There arent any related updates at ThingSpeak that would make that happen. Is it possible that your mobile provider changed something?

[jp Valeo]

The devices have SIM cards from different mobile providers. I'm going to do some tests and I'll report back

[jp Valeo]

I can confirm that it is not a mobile provider problem because the devices receive and send text messages without problems. I also changed the SIM of one of them to another provider and it continues sending the SMS. The problem is that ThingSpeak doesn't show the informatión collected by the device.

[FERNANDO HOOD]

Everything looks perfect yet not seeing anything on thingspeak is it beacuuase of SSL=0?

OK

AT+SAPBR=3,1,"Contype","GPRS"

OK

AT+SAPBR=3,1,"APN","ppinternet"

OK

AT+SAPBR=1,1

OK

AT+SAPBR=2,1

+SAPBR: 1,1,"10.97.59.50"

OK

AT+HTTPINIT

OK

AT+HTTPSSL=0

OK

AT+HTTPPARA="CID",1

OK

AT+HTTPPARA="URL","https://api.thingspeak.com/update?api_key=XXOYJUL99HKPG10L&field1=0054"

OK

OK

AT+HTTPACTION=1

OK

+HTTPACTION: 1,603,0

AT+HTTPREAD

OK

AT+HTTPTERM

OK

AT+SAPBR=0,1

OK

Sleep

[Christopher Stapels]

Does SSL=0 mean no certificate or insecure connection? If yes, then I dont think that is an issue.

I would make sure you can update your channel using the browser address bar to make sure you have the syntax correct and the channle is still configured how you expect.

[Christopher Stapels]

Also, please consider exporting the data to make sure there is not string data that doesnt show up in the plots.