# SIM7080G pico on Telstra NBIoT network **URL:** \ **Category:** Uncategorized\ **Created:** [19 July 2022 10:10 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626 "2022-07-19T10:10:33Z")\ **Posts on this page:** 11\ **Page:** 1
**Author:** ![Andrew205906](https://avatars.discourse-cdn.com/v4/letter/a/71c47a/32.png) [@Andrew205906](https://forum.core-electronics.com.au/u/Andrew205906)\ **Post date:** [19 July 2022 10:10 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/1 "2022-07-19T10:10:33Z")
Hi I recently purchased one of the SIM7080G pico units and a Pico with headers already done on order 1000389551 and I have a Telstra activated NBIoT SIM inserted but it is failing the AT tests and does not appear to recognise the SIM is inserted. The AT test script from the Waveshare doc runs OK in Thonny and the SIM7080G gets a red LED come up but will not connect to the Telstra NBIoT network or respond to the AT commands and does get the “Is the SIM inserted” question. The Pico appears to be working OK in general and I have also reloade the Micropython firmware but still can not get any response from the SIM7080G Could you please confirm this unit is supposed to work on Telstra NBIoT network in Australia? I am assuming it does or would not be for sale in Aust as it would be useless here but wanted to check. The SIM7080G is not responding to any AT commands (including just AT) but does appear to power up as it gets the red LED on at the start but this also goes off after a while. Any suggestions would be welcome. Regards Andrew McLennan ---
**Author:** ![Liam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam/32/3562_2.png) [@Liam](https://forum.core-electronics.com.au/u/Liam)\ **Post date:** [20 July 2022 01:28 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/2 "2022-07-20T01:28:58Z")
Hi Andrew, Welcome to the forum 🙂 > [@Andrew205906](#): > > The SIM7080G is not responding to any AT commands (including just AT) but does appear to power up as it gets the red LED on at the start but this also goes off after a while. Just to confirm, are you receiving any AT commands back from the HAT? Would it be possible to send through a photo of how you have the HAT setup? > [@Andrew205906](#): > > Telstra NBIoT network in Australia Yeah the band allocation on this module matches the available bands on Telstra’s NB-IoT network ([Bands 28, and 3](https://www.telstra.com.au/content/dam/shared-component-assets/tecom/iot/capabilities/certified-devices/telstra-m2m-certified-devices-modules.pdf)) From the schematic it seems like the only available LEDs are the ‘netlight’ - a simple AT-command controlled LED and ‘Charge’ - only should be on if the onboard LiPo charger is currently running Liam ---
**Author:** ![Trent5487676](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/trent5487676/32/4583_2.png) [@Trent5487676](https://forum.core-electronics.com.au/u/Trent5487676)\ **Post date:** [20 July 2022 01:32 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/3 "2022-07-20T01:32:26Z")
Hi Andrew, I don’t yet have an answer regarding the AT commands but after your follow-up question regarding what voltages SIM cards in Australia use I may be able to shed some light. I’ve done some reading and the standard grade [Hologram Global sims we stock](https://core-electronics.com.au/hologram-global-iot-sim-card.html) (they are available in Industrial and Standard grades) run at 1.6V, 3V and 5V. [This stage exchange thread](https://electronics.stackexchange.com/questions/35358/determine-the-operating-voltage-of-a-sim-card) indicates that these devices will always attempt to run at the lowest voltage compatible, and if a response is not given at one voltage they will retry with a higher voltage until a compatible level is found. ---
**Author:** ![Andrew205906](https://avatars.discourse-cdn.com/v4/letter/a/71c47a/32.png) [@Andrew205906](https://forum.core-electronics.com.au/u/Andrew205906)\ **Post date:** [20 July 2022 05:54 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/4 "2022-07-20T05:54:05Z")
Hi Liam This is the RPI Pico version of the SIM7080G rather than the RPI Hat version for the ‘normal’ RPIs (or supposed to be at least and what is printed on the box). There are no responses to the AT commands using either the Waveshare supplied AT test script or direct entry of AT commands. The commands are echoed with no response and show like \ ***script output starts** Setting to NB-IoT mode: AT+CFUN=0 back: AT+CNMP=38 back: AT+CMNB=2 back: AT+CFUN=1 back: AT+CPIN? back: **script output ends** which I was interpreting as no response to the script AT commands and the same empty “back:” section on directly entered AT commands I have connected the 2 devices in the same orientation shown in the doc so fairly sure they are the right way around 🙂 I also attached a picture for you to check. As mentioned the charge LED does come on for a few secs when the Pico boots so I think they are connected correctly. Regards Andrew ---
**Author:** ![Andrew205906](https://avatars.discourse-cdn.com/v4/letter/a/71c47a/32.png) [@Andrew205906](https://forum.core-electronics.com.au/u/Andrew205906)\ **Post date:** [20 July 2022 05:59 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/5 "2022-07-20T05:59:13Z")
Hi Liam Sorry, forgot to attached the picture of the devices connected Regards Andrew ![PicoWithSIM7080G.jpg](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/8/86b183052ab02c7aaa200ef258cf4c40742f7000.jpeg) ---
**Author:** ![Andrew205906](https://avatars.discourse-cdn.com/v4/letter/a/71c47a/32.png) [@Andrew205906](https://forum.core-electronics.com.au/u/Andrew205906)\ **Post date:** [20 July 2022 07:59 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/6 "2022-07-20T07:59:05Z")
Hi Liam I looked at the Hologram Global SIM info and pricing but while they mention LTE CAT-M1 (and note possible limited coverage availability), they dont mention NBIoT as a usable connection type. Do you know if they support NBIoT as well as LTE-M1 in Australia? Their country list only shows LTE-M1 in Australia so I am guessing they dont support NBIoT and possibly not anywhere. I guess it may not matter given the LTE coverage is not much less than LTE-M1/NBIoT in Australia and their pricing does not differentiate like the Aust Carriers do (LTE-M/NBIoT starts at lower minimum monthly prices than LTE from the Carriers) but I am interested to know the how this works for Hologram with the LTE-M and NBIoT networks. Are you able to test if the Hologram SIMs work in the SIM7080G card with the Pico? The Waveshare doc shows it requires a AT command to select between LTE-M and NBIoT on this board. I am happy to test this on the devices I have if you want to send me a Hologram SIM 🙂 Regards Andrew ---
**Author:** ![Liam](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/liam/32/3562_2.png) [@Liam](https://forum.core-electronics.com.au/u/Liam)\ **Post date:** [29 July 2022 04:08 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/7 "2022-07-29T04:08:02Z")
Hi Andrew, Sorry for the delay in getting back to you! > [@Andrew205906](#): > > ![PicoWithSIM7080G.jpg](https://canada1.discourse-cdn.com/flex028/uploads/core_electronics/original/2X/8/86b183052ab02c7aaa200ef258cf4c40742f7000.jpeg) From the photo, it looks like the antenna isn’t connected which can lead to a damaged radio and ‘failed’ AT commands > [@Andrew205906](#): > > Do you know if they support NBIoT as well as LTE-M1 in Australia? Unfortunately, I haven’t been able to dabble with the Hologram SIMs at all in my Maker journey just yet. The safest bet might be to stick with your current SIM and try to get the Pico connected. If you run the `ATI` command is the device ID returned? Liam ---
**Author:** ![Andrew205906](https://avatars.discourse-cdn.com/v4/letter/a/71c47a/32.png) [@Andrew205906](https://forum.core-electronics.com.au/u/Andrew205906)\ **Post date:** [29 July 2022 07:29 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/8 "2022-07-29T07:29:08Z")
Hi Liam Both antennas have been connected every time it has been powered on, the photo had no power connected and I remove both the antenna flyleads when storing the unit as it is not yet mounted in a box and these leads are easily damaged. There was no response at all to any AT commands in the Waveshare AT test script which also includes GPS AT commands which should work even if the radio is upset. I am aware many radios like this require the antenna connected to avoid damage but I do not think this is mentioned anywhere in the sales or support doc for this unit which it really should be if this is the case. I have been moving house and not had a chance to try again but I have ordered a Hologram SIM in case the Telstra one is not 1.8V compatible (they have not yet been able to confirm this). I will try again when I get a chance. Regards Andrew ---
**Author:** ![Callum180427](https://avatars.discourse-cdn.com/v4/letter/c/eada6e/32.png) [@Callum180427](https://forum.core-electronics.com.au/u/Callum180427)\ **Post date:** [23 May 2025 23:48 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/9 "2025-05-23T23:48:07Z")
Hey guys. Did anyone get any further with this? The I’m having exactly the same issue. I don’t think the problem is the carrier. The modem will return 0 values for a lot of AT commands. This script is returning nothing. It doesn’t sound like the pico is talking to the sim7080 at all. Any core electronics staff know what’s going on? I ready the wiki a few times and you need to run main.py before trying to run script. Can’t find it though. ---
**Author:** ![Callum180427](https://avatars.discourse-cdn.com/v4/letter/c/eada6e/32.png) [@Callum180427](https://forum.core-electronics.com.au/u/Callum180427)\ **Post date:** [23 May 2025 23:52 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/10 "2025-05-23T23:52:20Z")
Sorry to clarify: AT just check if the modem return a signal, this returns nothing so the pico is working but the sim7080 is a brick at this stage. I can get it to power on only with the battery, which will give me a power LED and a flashing no carrier signal and doesn’t appear to be talking to the pico. ---
**Author:** ![Samuel](https://yyz2.discourse-cdn.com/flex028/user_avatar/forum.core-electronics.com.au/samuel/32/11763_2.png) [@Samuel](https://forum.core-electronics.com.au/u/Samuel)\ **Post date:** [26 May 2025 03:11 UTC](https://forum.core-electronics.com.au/t/sim7080g-pico-on-telstra-nbiot-network/14626/11 "2025-05-26T03:11:27Z")
Hey @Callum180427, The main.py file should be packaged up with the firmware you need to run on the Pico. The wiki documentation is a little tricky to follow and jumps around a bit. Try following these steps from the wiki first: > **[Pico SIM7080G Cat-M/NB-IoT - Waveshare Wiki](https://www.waveshare.com/wiki/Pico-SIM7080G-Cat-M/NB-IoT#Flash_Firmware)** You should be able to download and extract the .uf2 file for either your Pico or Pico2 from this link and flash it to the board using the provided instructions. Once this is complete, the next time you plug your Pico into your computer, it should have a main.py file loaded onto it.