<?xml version="1.0" encoding="UTF-8"?><rss xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"><channel><title><![CDATA[Cellular Modems]]></title><description><![CDATA[Discuss questions related to integrating VOXL products with cellular modems]]></description><link>https://forum.modalai.com/category/12</link><generator>RSS for Node</generator><lastBuildDate>Wed, 08 Jul 2026 11:16:31 GMT</lastBuildDate><atom:link href="https://forum.modalai.com/category/12.rss" rel="self" type="application/rss+xml"/><pubDate>Mon, 01 Jun 2026 13:01:12 GMT</pubDate><ttl>60</ttl><item><title><![CDATA[LTE v2 VPN]]></title><description><![CDATA[@Barry-Hammond https://docs.modalai.com/voxl-streamer/#how-to-stream-video-with-rtsp-on-voxl
Quality greatly depends on your LTE coverage and VPN performance. I recommend lowering the bitrate in /etc/modalai/voxl-streamer.conf until you're happy with the response rate.
Tailscale can add overhead as well and our recent LTE testing has involved hosting a custom WireGuard server.
]]></description><link>https://forum.modalai.com/topic/5230/lte-v2-vpn</link><guid isPermaLink="true">https://forum.modalai.com/topic/5230/lte-v2-vpn</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Mon, 01 Jun 2026 13:01:12 GMT</pubDate></item><item><title><![CDATA[5G Modem Cannot Connect to Private 5G Network]]></title><description><![CDATA[@spiff You'll likely need to reach out to Sierra Wireless directly for debug help.
]]></description><link>https://forum.modalai.com/topic/5156/5g-modem-cannot-connect-to-private-5g-network</link><guid isPermaLink="true">https://forum.modalai.com/topic/5156/5g-modem-cannot-connect-to-private-5g-network</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Mon, 06 Apr 2026 15:31:39 GMT</pubDate></item><item><title><![CDATA[EM9291 eSIM profile]]></title><link>https://forum.modalai.com/topic/4898/em9291-esim-profile</link><guid isPermaLink="true">https://forum.modalai.com/topic/4898/em9291-esim-profile</guid><pubDate>Mon, 01 Dec 2025 19:57:36 GMT</pubDate></item><item><title><![CDATA[5G Signal Strength]]></title><description><![CDATA[@Capstone-0 Our drone crashed and we ditched our project but has ModalAI added support for AT commands for the 5G (I assume EM9291) modem yet? If not, I figured out how to do it and posted instructions here
https://forum.modalai.com/post/19131
Once you get those commands, you can set up a service to query the modem for its signal strength and pump the output somewhere. Someone else in that forum discusses it a bit.
]]></description><link>https://forum.modalai.com/topic/4879/5g-signal-strength</link><guid isPermaLink="true">https://forum.modalai.com/topic/4879/5g-signal-strength</guid><dc:creator><![CDATA[groupo]]></dc:creator><pubDate>Wed, 19 Nov 2025 19:21:19 GMT</pubDate></item><item><title><![CDATA[Mint Mobile Configuration]]></title><description><![CDATA[@Moderator Mint operates on the TMobile network so you we use the APN: fast.t-mobile.com.
I have noticed that when I use the Mint SIM in an Android phone it uses the wholesale APN but fast.t-mobile.com will work with our modems.
]]></description><link>https://forum.modalai.com/topic/4707/mint-mobile-configuration</link><guid isPermaLink="true">https://forum.modalai.com/topic/4707/mint-mobile-configuration</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Tue, 26 Aug 2025 23:43:11 GMT</pubDate></item><item><title><![CDATA[Rb5 changing IP from 5G modem intermittently]]></title><link>https://forum.modalai.com/topic/4430/rb5-changing-ip-from-5g-modem-intermittently</link><guid isPermaLink="true">https://forum.modalai.com/topic/4430/rb5-changing-ip-from-5g-modem-intermittently</guid><pubDate>Fri, 16 May 2025 08:32:53 GMT</pubDate></item><item><title><![CDATA[Unable to configure LTE modem]]></title><description><![CDATA[@Alex-Kushleyev That was it! I first tried with a lower baud rate of 250K on PX4 and I started getting the battery info. Then as you recommended, I uploaded new parameters to the ESC. I used:
python3 voxl-esc-upload-params.py --params-file ../voxl-esc-params/D0014_starling_1504_3000kv_ms_props/D0014_starling_1504_3000kv_ms_props.xml
because I will be using it on a drone of similar size and performance. Then with 2M baud rate in PX4, I was able to make it work!
Thank you.
]]></description><link>https://forum.modalai.com/topic/4356/unable-to-configure-lte-modem</link><guid isPermaLink="true">https://forum.modalai.com/topic/4356/unable-to-configure-lte-modem</guid><dc:creator><![CDATA[h3robotics]]></dc:creator><pubDate>Fri, 18 Apr 2025 02:01:31 GMT</pubDate></item><item><title><![CDATA[5G Modem not working]]></title><description><![CDATA[@LR The 5G configuration on Starling 2 is a fairly new offering so there may not be fully representative docs live.
]]></description><link>https://forum.modalai.com/topic/4317/5g-modem-not-working</link><guid isPermaLink="true">https://forum.modalai.com/topic/4317/5g-modem-not-working</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Fri, 04 Apr 2025 20:17:35 GMT</pubDate></item><item><title><![CDATA[VOXL Mini LTE modem USB connection not working]]></title><description><![CDATA[Hi @dan64
That is not the standalone Modem board variant and many other components are missing to make this work.
We do not currently sell the "standalone" version of the M0090 (5G) or M0130 (4G LTE), so sadly your efforts will hit a dead end.
]]></description><link>https://forum.modalai.com/topic/4276/voxl-mini-lte-modem-usb-connection-not-working</link><guid isPermaLink="true">https://forum.modalai.com/topic/4276/voxl-mini-lte-modem-usb-connection-not-working</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Fri, 21 Mar 2025 02:04:10 GMT</pubDate></item><item><title><![CDATA[Compatibility and Usage of 5G Modem with Starling 2 Drone]]></title><link>https://forum.modalai.com/topic/3812/compatibility-and-usage-of-5g-modem-with-starling-2-drone</link><guid isPermaLink="true">https://forum.modalai.com/topic/3812/compatibility-and-usage-of-5g-modem-with-starling-2-drone</guid><pubDate>Thu, 19 Sep 2024 17:57:21 GMT</pubDate></item><item><title><![CDATA[Quectel 5G-Modem doesn&#x27;t work at all]]></title><description><![CDATA[OK, cool  thanks
Will try.
]]></description><link>https://forum.modalai.com/topic/3787/quectel-5g-modem-doesn-t-work-at-all</link><guid isPermaLink="true">https://forum.modalai.com/topic/3787/quectel-5g-modem-doesn-t-work-at-all</guid><dc:creator><![CDATA[Jerry Lin]]></dc:creator><pubDate>Sun, 08 Sep 2024 07:51:19 GMT</pubDate></item><item><title><![CDATA[MAVLink not connecting on 5G]]></title><description><![CDATA[@pthomason Anyone have thoughts on correcting IP bindings, or the list of services that need to be restarted to notice a new 5G connection?
]]></description><link>https://forum.modalai.com/topic/3747/mavlink-not-connecting-on-5g</link><guid isPermaLink="true">https://forum.modalai.com/topic/3747/mavlink-not-connecting-on-5g</guid><dc:creator><![CDATA[pthomason]]></dc:creator><pubDate>Wed, 28 Aug 2024 17:16:04 GMT</pubDate></item><item><title><![CDATA[Monitor Sierra Wireless 5G signal?]]></title><description><![CDATA[@Thomas-Eiszler That's the plan we're working towards also, I did make some tries with AT commands also, but had to put the work aside for other commitments in the past few weeks. The information from yourself and @groupo above helps a lot. It shouldn't be too hard to make a service out of a python script for this. I'd been pursuing getting the data direct from the Qualcomm chipset, but AT commands and gpsd queries seen to be the way to go.
]]></description><link>https://forum.modalai.com/topic/3738/monitor-sierra-wireless-5g-signal</link><guid isPermaLink="true">https://forum.modalai.com/topic/3738/monitor-sierra-wireless-5g-signal</guid><dc:creator><![CDATA[pthomason]]></dc:creator><pubDate>Mon, 26 Aug 2024 16:30:07 GMT</pubDate></item><item><title><![CDATA[Firmware Update 5G Sierra and AT Command Interface]]></title><description><![CDATA[@tom That's really excellent news that you are working on the AT Command issue. I'm really looking forward to the update.
The thermal pad seems to be self-adhesive. When you loosen the screw it is held in place by the thermal pad.
I suspect that the thermal pad will need to be replaced if you force it off. Do you have a type designation for the thermal pad? Then I can buy a replacement somewhere.
Quectel modems are updated by plugging them into a USB adapter, connecting it to a Windows PC and installing the firmware update using proprietary Quectel software. With Sierra it probably works in a similar way.
]]></description><link>https://forum.modalai.com/topic/3628/firmware-update-5g-sierra-and-at-command-interface</link><guid isPermaLink="true">https://forum.modalai.com/topic/3628/firmware-update-5g-sierra-and-at-command-interface</guid><dc:creator><![CDATA[TomP]]></dc:creator><pubDate>Thu, 11 Jul 2024 08:47:13 GMT</pubDate></item><item><title><![CDATA[5G Quectel modem device-initiated U1 failed.]]></title><link>https://forum.modalai.com/topic/3610/5g-quectel-modem-device-initiated-u1-failed</link><guid isPermaLink="true">https://forum.modalai.com/topic/3610/5g-quectel-modem-device-initiated-u1-failed</guid><pubDate>Fri, 05 Jul 2024 01:15:09 GMT</pubDate></item><item><title><![CDATA[Localization via Quectel 5G modem]]></title><description><![CDATA[@tahawaru We have never tried that. But according to the Quectel product documentation it seems like it should be possible. Of course you would need to attach a suitable GNSS antenna to it. And if you want to use that with PX4 then you would need to create a new driver for it.
]]></description><link>https://forum.modalai.com/topic/3567/localization-via-quectel-5g-modem</link><guid isPermaLink="true">https://forum.modalai.com/topic/3567/localization-via-quectel-5g-modem</guid><dc:creator><![CDATA[Eric Katzfey]]></dc:creator><pubDate>Wed, 19 Jun 2024 15:06:00 GMT</pubDate></item><item><title><![CDATA[AT commands to a Sierra Wireless EM9291]]></title><description><![CDATA[hey not sure if this is an @tom or @modaltb inquiry, but when following the steps for the kernel build guide, stuff is off with the drone. It boots up and I can adb fine, but there are issues with the wifi, similar to another post Tom helped me with two weeks ago, but for definitely not the same hardware-related reason. The wifi adaptable does not turn on and when you run voxl-wifi the mac address is undefined. I remember stepping through those scripts while troubleshooting the hardware issues and recall that script queries to find its mac address, which must be returning something invalid.
I have tested this with both of my drones. I can very easily flash them back with https://docs.modalai.com/sentinel-factory-reset/ and they operate as expected. While my desire is to edit part of the usb driver scripts, the kernel I am attempting to put on the drone is the unchanged version following the steps here https://docs.modalai.com/voxl2-kernel-build-guide/. The only deviation from the guide is that the guide is written for SDK 1.1.3. I have put 1.3.0 on both of my drones, and from my understanding the docker scripts pull the default branch of each repo which has the same commit tags as 1.7.8. I have included the output of dmesg for both the 1.3.0 image available from the downloads page, and the results when following the custom kernel build steps.
https://drive.google.com/drive/folders/14L5gLbAOfF2OcSW2rHFTI4VIoREkTCFJ?usp=sharing
]]></description><link>https://forum.modalai.com/topic/3563/at-commands-to-a-sierra-wireless-em9291</link><guid isPermaLink="true">https://forum.modalai.com/topic/3563/at-commands-to-a-sierra-wireless-em9291</guid><dc:creator><![CDATA[groupo]]></dc:creator><pubDate>Tue, 18 Jun 2024 21:17:18 GMT</pubDate></item><item><title><![CDATA[Doodle Labs Not Connecting to QGC]]></title><description><![CDATA[@Chase-Riley yes, we can work with Doodle Labs to get this resolved
]]></description><link>https://forum.modalai.com/topic/3421/doodle-labs-not-connecting-to-qgc</link><guid isPermaLink="true">https://forum.modalai.com/topic/3421/doodle-labs-not-connecting-to-qgc</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Fri, 10 May 2024 12:33:17 GMT</pubDate></item><item><title><![CDATA[Quectel modem for Telecom operator outside of US - APN selection]]></title><description><![CDATA[@tahawaru I like using Google Fi, super easy to setup
]]></description><link>https://forum.modalai.com/topic/3414/quectel-modem-for-telecom-operator-outside-of-us-apn-selection</link><guid isPermaLink="true">https://forum.modalai.com/topic/3414/quectel-modem-for-telecom-operator-outside-of-us-apn-selection</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Wed, 08 May 2024 11:06:54 GMT</pubDate></item><item><title><![CDATA[Doodle Labs Mini Integration with VOXL 2]]></title><description><![CDATA[@Denver-Bennett Great, glad to hear that helped!
]]></description><link>https://forum.modalai.com/topic/3340/doodle-labs-mini-integration-with-voxl-2</link><guid isPermaLink="true">https://forum.modalai.com/topic/3340/doodle-labs-mini-integration-with-voxl-2</guid><dc:creator><![CDATA[Vinny]]></dc:creator><pubDate>Thu, 18 Apr 2024 14:19:54 GMT</pubDate></item><item><title><![CDATA[Serial communication with Sierra Wireless EM9291]]></title><description><![CDATA[@groupo em9191 should work for you
]]></description><link>https://forum.modalai.com/topic/3192/serial-communication-with-sierra-wireless-em9291</link><guid isPermaLink="true">https://forum.modalai.com/topic/3192/serial-communication-with-sierra-wireless-em9291</guid><dc:creator><![CDATA[tom]]></dc:creator><pubDate>Mon, 11 Mar 2024 06:42:54 GMT</pubDate></item><item><title><![CDATA[LTE Modem v2 Pro]]></title><link>https://forum.modalai.com/topic/2882/lte-modem-v2-pro</link><guid isPermaLink="true">https://forum.modalai.com/topic/2882/lte-modem-v2-pro</guid><pubDate>Mon, 20 Nov 2023 04:47:21 GMT</pubDate></item><item><title><![CDATA[Quectel 5G modem firmware version compatibility]]></title><link>https://forum.modalai.com/topic/2645/quectel-5g-modem-firmware-version-compatibility</link><guid isPermaLink="true">https://forum.modalai.com/topic/2645/quectel-5g-modem-firmware-version-compatibility</guid><pubDate>Mon, 11 Sep 2023 23:27:37 GMT</pubDate></item></channel></rss>