# LTE Cat 1 / Cat 1 bis (Calliope) **URL:** https://forum.sequans.com/c/gc02s1-calliope2/6.md [Latest](https://forum.sequans.com/latest.md) · [Categories](https://forum.sequans.com/categories.md) · [Tags](https://forum.sequans.com/tags.md) --- ## [Sequans\_GCO2S\_library\_ALTIUM does not contain a step file](https://forum.sequans.com/t/sequans-gco2s-library-altium-does-not-contain-a-step-file/662)
**Author:** [@Valentinas](https://forum.sequans.com/u/Valentinas)\ **Replies:** 0\ **Last updated:** [October 12, 2026, 8:45am UTC](https://forum.sequans.com/t/sequans-gco2s-library-altium-does-not-contain-a-step-file/662 "2026-10-12T08:45:37Z")
Hi, Could you please share the step file for this module? Thank you --- ## [Sequans\_GCO2S\_library\_ALTIUM vs datasheet pinout discrepancies](https://forum.sequans.com/t/sequans-gco2s-library-altium-vs-datasheet-pinout-discrepancies/661)
**Author:** [@Valentinas](https://forum.sequans.com/u/Valentinas)\ **Replies:** 0\ **Last updated:** [October 12, 2026, 8:45am UTC](https://forum.sequans.com/t/sequans-gco2s-library-altium-vs-datasheet-pinout-discrepancies/661 "2026-10-12T08:45:30Z")
Hi, There are many differences between the Altium symbol you provide in “OneDrive\_1\_10-9-2026” compared to the datasheet provided in that same package “Calliope2-GC02S1-DataSheet-Rev.4.pdf”. Could you please clarify wh… --- ## [Why there is ERROR when trying to enable SIM1 interface with AT+CSUS=1? ](https://forum.sequans.com/t/why-there-is-error-when-trying-to-enable-sim1-interface-with-at-csus-1/659)
**Author:** [@Peng\_Gao](https://forum.sequans.com/u/Peng_Gao)\ **Replies:** 0\ **Last updated:** [October 9, 2026, 2:42pm UTC](https://forum.sequans.com/t/why-there-is-error-when-trying-to-enable-sim1-interface-with-at-csus-1/659 "2026-10-09T14:42:50Z")
we have two SIMs connected to the GC02S WW module, SIM0 work and SIM1 does not work. AT+CSUS=1 returns ERROR. Any ideas ? Enabling SIM1 on a GC02S module has two parts: first enable the interface at hardware level wit… --- ## [Does Calliope support retain flag on MQTT messages?](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232)
**Author:** [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Replies:** 6\ **Last updated:** [September 24, 2026, 6:54am UTC](https://forum.sequans.com/t/does-calliope-support-retain-flag-on-mqtt-messages/232 "2026-09-24T06:54:54Z")
I have looked into all the MQTT AT commands but I couldn’t figure out how one would send an MQTT message with retain flag set to true. --- ## [DM Light – How to capture IP packets for a specific CID (CID 2 / CID 5)?](https://forum.sequans.com/t/dm-light-how-to-capture-ip-packets-for-a-specific-cid-cid-2-cid-5/593)
**Author:** [@MEZIANE\_Faouzi\_OF](https://forum.sequans.com/u/MEZIANE_Faouzi_OF)\ **Replies:** 1\ **Last updated:** [September 7, 2026, 9:37am UTC](https://forum.sequans.com/t/dm-light-how-to-capture-ip-packets-for-a-specific-cid-cid-2-cid-5/593 "2026-09-07T09:37:52Z")
Hello, We are currently testing IMS/VoLTE on a Calliope 2 GC02S1-EU2, running UE9.1.0.0 / LR9.1.0.0-64547 with the Orange operator profile. With an Orange France SIM (HPLMN 20801), LTE attachment and IMS registration w… --- ## [How does the modem automatically detects the operator mode?](https://forum.sequans.com/t/how-does-the-modem-automatically-detects-the-operator-mode/460)
**Author:** [@Raj](https://forum.sequans.com/u/Raj)\ **Replies:** 1\ **Last updated:** [July 10, 2026, 11:22pm UTC](https://forum.sequans.com/t/how-does-the-modem-automatically-detects-the-operator-mode/460 "2026-07-10T23:22:29Z")
how does the modem automatically detects the operator mode? Can it detect any operator or only selected operators? What should application do when the modem cannot detect the operator correctly and cannot attach? --- ## [Calliope GCO2S1 EU vs NA for Latin America (Colombia, Peru)](https://forum.sequans.com/t/calliope-gco2s1-eu-vs-na-for-latin-america-colombia-peru/394)
**Author:** [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Replies:** 1\ **Last updated:** [March 27, 2026, 3:26am UTC](https://forum.sequans.com/t/calliope-gco2s1-eu-vs-na-for-latin-america-colombia-peru/394 "2026-03-27T03:26:51Z")
We have our Calliope based devices that we are planning to deploy in Latin America for initial testing (Peru and Colombia to be specific). I understand that WW is coming out mid-2026 but I’m wondering if I one of the abo… --- ## [GC02S burn failed with CRC error](https://forum.sequans.com/t/gc02s-burn-failed-with-crc-error/382)
**Author:** [@fangcj](https://forum.sequans.com/u/fangcj)\ **Replies:** 1\ **Last updated:** [February 24, 2026, 6:39am UTC](https://forum.sequans.com/t/gc02s-burn-failed-with-crc-error/382 "2026-02-24T06:39:53Z")
There is a random upgrading error: Error outputs :caba (error): crc computed = 0xb666c83f, crc expected = 0xbff7c705. Confirmed Information: The file was buring into flash is exactly the app.dup file with right size… --- ## [Getting correct (synced time) from \`AT+CCLK?\`](https://forum.sequans.com/t/getting-correct-synced-time-from-at-cclk/324)
**Author:** [@David\_Ahmed](https://forum.sequans.com/u/David_Ahmed)\ **Replies:** 1\ **Last updated:** [January 29, 2026, 5:16pm UTC](https://forum.sequans.com/t/getting-correct-synced-time-from-at-cclk/324 "2026-01-29T17:16:44Z")
We are using Calliope (GC02S1-EU2) on our IoT gateway. The gateway needs to run CCLK for several reasons and we found some time sync issues. Later, we discovered that the fetched time was wrong. D (28456) AgNode: TX: AT… --- ## [Cat1bis HDFDD availability](https://forum.sequans.com/t/cat1bis-hdfdd-availability/342)
**Author:** [@YT\_Lee](https://forum.sequans.com/u/YT_Lee)\ **Replies:** 1\ **Last updated:** [January 26, 2026, 10:14pm UTC](https://forum.sequans.com/t/cat1bis-hdfdd-availability/342 "2026-01-26T22:14:57Z")
Hi From our understanding, adopting Cat1bis in HDFDD configuration would reduce the module cost as well as the overall solution cost, with savings of several dollars when compared to similar solution in FDFDD. Can you … --- ## [Cat 1bis network support](https://forum.sequans.com/t/cat-1bis-network-support/301)
**Author:** [@Imad](https://forum.sequans.com/u/Imad)\ **Replies:** 3\ **Last updated:** [December 22, 2025, 10:48am UTC](https://forum.sequans.com/t/cat-1bis-network-support/301 "2025-12-22T10:48:38Z")
Hello Sequans team, I have a question which may sound silly but how can I check if Cat 1bis is supported by the network in the country where I plan to use it? Thanks in advance John --- ## [Any recommended design flow for GC02S1?](https://forum.sequans.com/t/any-recommended-design-flow-for-gc02s1/296)
**Author:** [@Tom](https://forum.sequans.com/u/Tom)\ **Replies:** 1\ **Last updated:** [November 28, 2025, 1:33am UTC](https://forum.sequans.com/t/any-recommended-design-flow-for-gc02s1/296 "2025-11-28T01:33:26Z")
Hello Sequans community, I’m planning to purchase 10 GC02S1 modules from Mouser to build a smart home automation PoC. Do you recommend any specific development flow or best practices to minimize design risks and reduce … --- ## [PS\_STATUS floating at various voltages between 0 & 1.8v](https://forum.sequans.com/t/ps-status-floating-at-various-voltages-between-0-1-8v/256)
**Author:** [@Leon\_Lindenfelser](https://forum.sequans.com/u/Leon_Lindenfelser)\ **Replies:** 2\ **Last updated:** [November 10, 2025, 6:53pm UTC](https://forum.sequans.com/t/ps-status-floating-at-various-voltages-between-0-1-8v/256 "2025-11-10T18:53:26Z")
I am using the Calliope2 GCo2S1 EVK with an NA2 module. Sometimes the PS\_STATUS pin floats. I’m not sure how to make it happen but it seems most likely to happen upon applying power. I’ve seen it with no SIM or a Verizon… --- ## [When will the next Calliope 2 chip arrive?](https://forum.sequans.com/t/when-will-the-next-calliope-2-chip-arrive/127)
**Author:** [@sequans](https://forum.sequans.com/u/sequans)\ **Replies:** 1\ **Last updated:** [May 26, 2025, 9:56pm UTC](https://forum.sequans.com/t/when-will-the-next-calliope-2-chip-arrive/127 "2025-05-26T21:56:27Z")
When will the next Calliope hardware be released? --- ## [Conformance mode persistency over FOTA](https://forum.sequans.com/t/conformance-mode-persistency-over-fota/190)
**Author:** [@Alex](https://forum.sequans.com/u/Alex)\ **Replies:** 1\ **Last updated:** [May 1, 2025, 8:35pm UTC](https://forum.sequans.com/t/conformance-mode-persistency-over-fota/190 "2025-05-01T20:35:47Z")
Hello, Is the conformance mode persistent over FOTA ? Cheers; Alex --- ## [Does Sequans provide FreeRTOS USB drivers for Calliope2?](https://forum.sequans.com/t/does-sequans-provide-freertos-usb-drivers-for-calliope2/162)
**Author:** [@Grumpy](https://forum.sequans.com/u/Grumpy)\ **Replies:** 1\ **Last updated:** [April 25, 2025, 12:34pm UTC](https://forum.sequans.com/t/does-sequans-provide-freertos-usb-drivers-for-calliope2/162 "2025-04-25T12:34:43Z")
I am developing an application on FreeRTOS interfaced with USB port of the GC02S1 module. Do you have any information or drivers for such integration? --- ## [What to do with unused HW pins?](https://forum.sequans.com/t/what-to-do-with-unused-hw-pins/118)
**Author:** [@Grumpy](https://forum.sequans.com/u/Grumpy)\ **Replies:** 1\ **Last updated:** [April 17, 2025, 6:39pm UTC](https://forum.sequans.com/t/what-to-do-with-unused-hw-pins/118 "2025-04-17T18:39:35Z")
GC02S1 has pins that are unused in my application. For example I2C and GPIO pins. Your documentation does not specify if they should be connected to pull-up or pull-down resistors. Please advise on what to do with tho…