Interface and connectivity ICs

In my application I want to implement an custom inband communication between RX <--> TX。I've gone through the official datasheet but couldn't find clear information about the in-band communication data registers or buffers. Could you point me to any additional reference materials, application notes, or documentation on in-band communication?

Hi everyone,I am encountering an issue where my MCU freezes during continuous data transmission, and I am looking for some advice or debugging directions.Hardware & Setup: MCU: STM32U575 Network Module: ST67W611M1 Protocol: TCP Driver/Firmware Version: V1.3.0 Issue Description: My application is designed to send a 1KB data packet to a remote server every 3 seconds. The transmission works perfectly fine at the beginning. However, after successfully transmitting several hundred KBs in total, the MCU gets stuck.Through debugging, I found that the firmware completely hangs inside the W61_Net_SendData() API.Observations: The remote server is confirmed to be alive and functioning normally when the hang occurs. The MCU does not hard fault; it simply blocks indefinitely inside W61_Net_SendData(). My Questions: Are there any known issues regarding buffer overflows or memory leaks in this specific API when sending large amounts of data over time? Is there a way to configure a non-b

Hello ST-Team.How can I configure the receiver’s LDC mode so that the LDC timer runs for 4 seconds and then reliably receives a data packet? I want to configure GPIO3 as the RX_DATA_READY interrupt so that the microcontroller wakes up, processes the data, sends an acknowledgment, and then returns to LDC mode.How must the timing be configured on the transmitter side? It would have to send many data packets so that the receiver catches one of them inside the RX window. And when is the acknowledgment allowed to be sent?The goal is to achieve ultra‑low power consumption on the receiver side. Do you have a solution for this?

Dear ST team,I have configured the ST87M01 for sending +CEREG URCs when registration state changes with AT+CEREG=5.But the modem attaches, but does not sent +CEREG notification (see traces below): Is this a nominal behavior ?AT+CEREG=5OKAT+CEREG=?+CEREG: (0,1,2,3,4,5)OKAT+CEREG?+CEREG: 5,2,"","",,,,"",""OK+CEREG: 0,"","",,,,"",""+CEREG: 2,"","",,,,"",""+CSCON: 1+CEREG: 0,"","",,,,"",""+CSCON: 0+CEREG: 2,"","",,,,"",""+CSCON: 1+CEREG: 0,"","",,,,"",""+CSCON: 0+CEREG: 2,"","",,,,"",""+CSCON: 1+CEREG: 0,"","",,,,"",""+CSCON: 0+CEREG: 2,"","",,,,"",""+CSCON: 1+CEREG: 0,"","",,,,"",""+CSCON: 0+CEREG: 2,"","",,,,"",""+CSCON: 1+CSCON: 0+CEREG: 0,"","",,,,"",""#STENG: ECID=08507721,SRV1=FFB11868,PLMN=0002F802,EDRX=00000001,PSM=00000000,ENRG=000045D7#SLEEP DRX 2.4s#WAKEUP DRX#STENG: ECID=08507721,SRV1=FFB21868,PLMN=0002F802,EDRX=00000001,PSM=00000000,ENRG=00000016#SLEEP DRX 1.7s#WAKEUP DRX Best regards,Thierry

Hello Team, We are currently investigating an issue related to the SPI communication between the STPM34 sensor and the STM32F4 microcontroller.At system startup, all values measured by the STPM34 remain stuck at zero. Even when voltage and current are injected using an OMICRON test bench, no measurement values are received or displayed.Several tests were performed:If we power up the system and confirm that the issue is present, then electrically restart only the board containing the STPM34, the communication recovers correctly and the measured values are no longer stuck at zero.We also soldered wires on one of the SPI buses (SPI1). Since there are two STPM34 devices on the board, two SPI instances are used to communicate with each sensor. The purpose was to verify whether the communication between the sensor and the STM32 was correctly established.Interestingly, simply soldering wires on this SPI bus makes the issue disappear for this instance. However, on the second SPI instance,

从数据手册只能了解STWLC68的TX流程，而它的RX流程不清楚。STWBC86的TX与RX都不清楚。我想实现的目标是MCU采用i2c通过STWBC86读取STWLC68的i2c寄存器或者MCU采用i2c读取STWBC86收到来自STWLC68的TX数据。我应该如何去发送和接收数据以及在哪儿去拿数据。是否能提供两个芯片固件库的白皮书或使用手册？Google translation: “The datasheet only provides information on the STWLC68's TX flow, but its RX flow is unclear. The STWBC86's TX and RX flows are also unknown. My goal is for the MCU to use I2C to read the STWLC68's I2C registers via the STWBC86, or for the MCU to use I2C to read TX data received from the STWLC68 via the STWBC86. How should I send and receive data, and where should I retrieve the data? Could you provide the white paper or user manual for both chip firmware libraries?”

Hi, i experimented the following configuration STEVAL-MKBOXPRO with BLEMLC code available within FP-SNS-STBOX1 package. For my specific application, i want to increase the BLE transmit power of the BlueNRG-LP chip of the MKBOXPRO. So i modified the code with the aci_hal_set_tx_power_level(1,31) +8dBm (since default value was  aci_hal_set_tx_power_level(1,4) -16dBm). Everything is fine with compilation with Cube IDE. But in practice with the app ST BLE Sensor v5.2.6, the real connection distance still remains about 25m, with a disconnect when RSSI is about -92dBm. These values are correct but what is not correct is that any tries to change aci_hal_set_tx_power_level with different "theoretical" power levels (from -54dBm to +8dBm) do not change anything in practice. It looks like aci_hal_set_tx_power_level has no effect on "real" transmitted poser. Any help will be welcomed to this topic. Thanks reading et thanks in advance or your help. Christian

Hello I am trying to use STM32N6 with ST67W611.What works so far:STM32N6570-DK with X-NUCLEO-67W61M1, I am able to run my firmware that creates an AP and runs a web server with files from the SD card. Based on the discovery board and the ST67 nucleo, I have designed my own PCB. I have three times the exact same board. 001, 002 and 003.Board 001 works fine, AP and web server start. This is the console output:--------------- ST67W6X info ------------ST67W6X MW Version: 1.2.0AT Version: 1.0.0SDK Version: 2.0.97Wi-Fi MAC Version: 1.6.44BT Controller Version: 1.6.121BT Stack Version: 1.10.70Build Date: Nov 19 2025 11:35:01Module ID: C6AFDBD111400004 (-B)BOM ID: 2Manufacturing Year: 2025Manufacturing Week: 13Battery Voltage: 3.348 VTrim Wi-Fi hp: 5,5,5,5,5,5,4,4,4,4,5,5,5,5Trim Wi-Fi lp: 5,5,6,6,6,7,7,7,7,7,8,8,8,8Trim BLE: 4,3,3,4,5Trim

Specific part: ST4SI3M004600HFWAccessed via Quectel modem AT commandshttps://estore.st.com/en/st4si3m004600hfw-cpn.htmlAccording to the product page, it features "Bootstrap connectivity profile provided by a trusted partner".Application note AN5740 says that it applies to ST4SIM-300M (https://www.st.com/resource/en/application_note/an5740-st4sim-with-truphone-connectivity--activation-procedure-stmicroelectronics.pdf).At time of writing ST4SI3M004600HFW, appears to be the only instance of ST4SIM-300M available.So it sounds like the activation instructions in AN5740 should apply to ST4SI3M004600HFW.Those instructions rely on reading the ICCID and feeding it to Truphone.However, the eSIMs that we (and other users) encounter have ICCIDs which are neither unique nor recognised by Truphone (https://community.st.com/interface-and-connectivity-ics-52/st4sim-300m-getting-the-same-iccid-162326).Questions:- Does AN5740 apply to ST4SI3M004600HFW?- Is there a version of the chip that does come with

Hello! I currently have several questions regarding STM8500 + STLD1 DC carrier communication. Please reply!   1: I send differential signals via STLD1, which are capacitively coupled at high voltage between DC48V and DC48V_GND, then received at the receiving end. Shouldn't be any issues, right? The theoretical transmission distance can reach 3km, right? Is there a more complete reference schematic design available? The schematic provided in the official manual is incomplete.   2: The STM32F401 communicates with the ST8500 via UART. Can I use the ST8500 simply by calling AT commands or API interfaces? Or do I need to program the ST8500 itself or download firmware to use it?   *This post has been translated from Chinese to comply with the ST Community guidelines.

Hello,I am testing FP-SNS-BLEMESH1 on two STEVAL-MKBOXPROA boards.Setup:Board: STEVAL-MKBOXPRO AFirmware: BlueNRG-Mesh Sensor Demo v2.1.3Library: BlueNRG-Mesh Library v01.14.000Bearer: PB-ADVOne board configured as Embedded ProvisionerOne board configured as Sensor Node (unprovisioned device)Issue #1 – Embedded Provisioner cannot discover unprovisioned nodeThe provisioner starts scanning correctly, but no unprovisioned device is found.At scan step, the console reports that no unprovisioned device is nearby, even when the second board is physically next to the provisioner.The sensor node logs show:DIAG: PB_ADV_SUPPORTED=1 PB_GATT_SUPPORTED=1 BEARER_INFO=3 Unprovisioned device BlueNRG-Mesh Sensor Demo v2.1.3 BlueNRG-Mesh Library v01.14.000 BLE Stack Initialized & Device ConfiguredSo the node appears to advertise correctly as unprovisioned.Issue #2 – ST BLE Mesh mobile app crashes/stops after provisioningSince Embedded Provisioner could not discover the node, I switched to the ST B

Does the ST67W611M1  (-B version) with PCB antenna have a built in rf switch? We want to programmatically or via pins switch between the PCB antenna and an external antenna.

Module / setup- Module: ST87M01-1301- Host: STM32-class MCU over UART, 115200 8N1, no flow control- Carrier: 1NCE NB-IoT (auto-PDP on CID 5)- AT manual reference: v3.1, 2025-10-06Current sleep-related configuration16:34:39.720 -> === AT readbacks ===16:34:39.720 -> >>> AT+CGMR16:34:39.720 -> <<< A:2.7.0-M:2.7.0-S:2.7.016:34:39.720 -> <<< OK16:34:39.720 -> >>> AT#SLEEPMODE?16:34:39.720 -> <<< #SLEEPMODE: 1,5,016:34:39.720 -> <<< OK16:34:39.720 -> >>> AT#WAKEUPEVENT?16:34:39.720 -> <<< #WAKEUPEVENT: 15,316:34:39.720 -> <<< OK16:34:39.720 -> >>> AT#SLEEPIND?16:34:39.720 -> <<< #SLEEPIND: 0C16:34:39.720 -> <<< OK16:34:39.720 -> >>> AT#RINGPIN?16:34:39.720 -> <<< #RINGPIN:0,20,1,10016:34:39.720 -> <<< OK16:34:39.720 -> >>> AT+CPSMS?16:34:39.847 -> <<< +CPSMS: 1,,,"10010100","0000111

Hi,here is a post for wireless community (Sub-1Ghz solutions) to answer many frequently asked questions and good practices using ST S2-LP transceiver.please find attached document to get additional information on this perfect Radio chipset.ThanksPhilippe

Hello,I am an engineering student working on my senior graduation project using the STEVAL-WBC2TX50 evaluation board. I need the STSW-WBC2STUDIO (or the updated WPSTUDIO) GUI to configure the board, but all official links on the ST website return a 404 error.Could you please provide a working download link or the installer files? My project exhibition is approaching soon, and this is a critical blocker.Thank you for your support.

(official project, W61 firmware updated, full setup completed) **[BUG/HELP] X-CUBE-ST67W61 V1.2.0 — sem_if_ready not received on NUCLEO-N657X0-Q after complete setup**---**Hardware:**- NUCLEO-N657X0-Q (MB1940)- X-NUCLEO-67W61M1 (MB2230)- JP1 and JP2 closed, Arduino connectors fully seated**Software:**- STM32CubeIDE 1.16.x- X-CUBE-ST67W61 V1.2.0- X-CUBE-FREERTOS V1.4.0- STM32CubeProgrammer v2.22.0- Project: ST67W6X_Echo for NUCLEO-N657X0-Q (official, unmodified)---**Setup completed (all steps verified):**1. W61 firmware updated to st67w611m_mission_t01_v2.0.97 using QConn_Flash_Cmd via COM port — [All Success] with SHA256 match2. FSBL compiled from official project (0 errors, 0 warnings), signed with STM32_SigningTool_CLI --align (v2.22.0), flashed to 0x70000000 and verified successfully3. OTP word 124 programmed to 0x00018000 (HSLV_VDDIO2 + HSLV_VDDIO3)4. Boot switches in flash boot mode (BOOT0: 1-2, BOOT1: 1-2)5. eraTerm on STLink VCP, 921600 baud---**Terminal output (always the

Dear all,is it possible to measure the frequency of the 32,768kHz oscillator (external crystal used) at a buffered pin similar to the MOC pin of the STM32 to tune the frequency by the external capacitors? It would be difficult to do this at pin XTAL32k_IN/OUT without influencing the oscillator frequency.Best regards,Peter

Good afternoon,First post here, so aologies for any ignorance.I am trying to combine the subghz radio feature of WL55JC1 and the ST60 high frequency communication Full Duplex UART bridge.Ideally, I would be switching between these two functions.I have ported the ST60 example to the WL55JC1 dev board, and can get both running independently.But my problems arise because the subghz radio example uses the STM32 Sequencer utility, while the ST60 doesn't.When I try to integrate the sequencer into the ST60 code, it seems like the I2C comm/config channel for ST60 stops working.Does anyone have any guidance/direction in this area?Appreciate your time.

Hi, hope you doing good,In our design, we are using the ST60A3H1C1CCEPY3 controller. please clarify if there are any layout restriction or keep-out zones around the controller where other peripherals should not be placed.Thanks,

Hello Team, Hope you are well! Could you confirm if the following top marking on ST4SI1M0008SCIFW is correct? 8942310525 000000923 FN527 Many thanks! Robert

Split from  ST87M01 : MAX length of the data returned by AT#IPREAD - which is solved.This is, indeed, a new question.Hello Didier,I have an additional question on this topic (I don't know if I should create a new post, but this question is very much linked to the previous one...) :- From the ST87MXX AT Command User Manual §9.8 AT#IPSENDUDP, the max IP frame size is 1400 bytes- But from ST87MXX TCP/UDP-IP Application Note §3.2 IP default parameters command, the max IP frame size is 1600 bytes,Is there a mistake in one of these documents, or is there something that I didn't understand ?Best regardsThierry

Dear ST team,In the ST87MXX AT Command User Manual, I can find that I can retrieve the data received on a socket withAT#IPREAD:AT#IPREAD=<context_id>,<socket_id>#IPREAD: <context_id>,<socket_id>,<data_length><data>OKBut I cannot find the max length of the <data> field that can be returned by the modem. Where could I find this information ?Best RegardsThierry

I am using STM32H723ZGT6 as the host MCU with the ST67W611M1 Wi-Fi + BLE module. Software details: Firmware flashed on ST67: T01 binary STM32 firmware package: X-CUBE-ST67W61(1.1.0) Application selected: BLE P2P Enabled parameters: Wi-Fi SAP: Yes Wi-Fi STA: Yes BLE: Yes NET: Yes DHCP: STA+SAP Issues observed: Intermittent failure after reset in debug mode When I reset the board while running in debug mode, the system sometimes does not work correctly(w6x init failed or other intiliazation failed in mainapp.c). The behavior is inconsistent—occasionally it works, but often it fails after reset.   Wi-Fi SoftAP start failure The following API fails: ret = W6X_WiFi_StartAp(&ap_config); While debugging, the failure occurs due to a timeout in the following function: /* Initialize the dual interface mode */ ret = TranslateErrorStatus(W61_WiFi_SetDualMode(p_DrvObj)); SPI clock configuration doubt Could you please confirm the recommended SPI clock frequency for STM32H723ZGT6 when interf

Hi ST community,I am using STM32H723ZGT6 as the host MCU with the ST67W611M1 Wi-Fi + BLE module.Software details:Firmware flashed on ST67: T01 binarySTM32 firmware package: X-CUBE-ST67W61(1.1.0)Application selected: BLE P2PEnabled parameters:Wi-Fi SAP: YesWi-Fi STA: YesBLE: YesNET: YesDHCP: STA+SAPIssues observed:Intermittent failure after reset in debug modeWhen I reset the board while running in debug mode, the system sometimes does not work correctly(w6x init failed or other intiliazation failed in mainapp.c). The behavior is inconsistent—occasionally it works, but often it fails after reset.Wi-Fi SoftAP start failureThe following API fails:ret = W6X_WiFi_StartAp(&ap_config);While debugging, the failure occurs due to a timeout in the following function:/* Initialize the dual interface mode */ret = TranslateErrorStatus(W61_WiFi_SetDualMode(p_DrvObj));SPI clock configuration doubtCould you please confirm the recommended SPI clock frequency for STM32H723ZGT6 when interfacing with S

Hello, I am working with the ST67W61 WiFi module and NCP firmware provided in X-CUBE-ST67W61. The firmware flashing process works correctly when using the reference setup: NUCLEO-U575ZI-Q X-NUCLEO-67W61M1 expansion board However, the same flashing procedure fails on our custom board, which is designed based on the X-NUCLEO-67W61M1 schematics. Issue observed:During NCP flashing over UART, the process fails at handshake stage with the following error: "ack is b''" "CHIP IMG LOAD SHAKEHAND FAIL" Observations: UART communication appears inactive (no response from module) Same firmware and flashing tool used Same COM port configuration verified Power supply is stable (3.3V confirmed) Issue is reproducible consistently on custom board Connections replicated from reference design: CN6: 3V3, 5V, GND CN5: SPI (CLK, MOSI, MISO, CS) CN9: BOOT, CHIP_EN, SPI_RDY, UART TX/RX Suspected area:We suspect the issue may be related to: BOOT pin configuration during reset CHIP_EN / RESET sequencing