STM32 MCUs Wireless

Board resets systematically from standby mode

Hello,I would like to reach the lowest consumption as possible. I am programming an end node which sends data through TTN. My project is based on the LoRaWAN End Node example with the LoRaWAN middleware. My fimrware works like that :at boot, the boar...

IWDG in STOP2

I'm using MCU STM32WB55CE. The issue is the following:after putting MCU in STOP mode it looks like IWDG still running and reset the MCU.Option byte: 0x3B79F1AA, means bit IWDG_STDBY and IWDG_STOP clear.I'm using SEGGER J-Link for debugging. Ble stack...

I have problem with UsageFault_Handler occurance. I have build beacon project that is advertising adc data every second and then go to sleep mode. After some time processor stop and go to fault. It happens random time after start. When go to sleep mode

is disabled problem dissappear. When fault accured thread shows 0x2, 0xffffffe9, 0xf000af00, adresses jumps. Fault Analyze tool shows sp (MSP) at 0x2002ff30, pc at 0x2, xpsr at 0x2, r1-r3 at 0x2, r12 at 0x3, mmfar at 0xe00, usage fault details attemt...

STM32WB55 - unexpected current pulses in STOP2 and standby modes

Hello,I'm developing a battery-powered application for the STM32WB55 (specifically the STM32WB55RGV6) and am seeing periodic pulses or spikes in the SoC's current consumption every 200ms in STOP2 and standby modes. These pulses occur with the Nucleo ...

Resolved! STM32WB55 Shutdown mode

Ciao,I am trying to put my STM32wb55 in shutdown mode and wake it up using 2 external pins.Wake-up sources are on PA0 (active high) and PC12 (active low). Those should be PIN1 and PIN3 wake-up sources.This is the code I use to put the device in shutd...

I'm trying to get wakeup from STOP mode on a P-NUCLEO-WB55 using the example project PWR_STOP1. It stops OK, but isn't woken up by a button push. I confirmed that the button push was generating interrupts. Any suggestions?

Resolved! RTC is not incremented with a voltage Vbat below 0.6V

Hello,we use an STM32WB55 with an RTC backup via a super capa.when the Vbat voltage drops below 0.6V, the RTC registers are no longer incremented.if the board reboots at this point, we have a datetime offset.is it possible to detect this problem when...

Save energy with CPU2 in iddle mode on STM32WB10

I am a new developer on STM32WB10 and I do not succeed to drastically decrease power consumption in standby mode. Commands for main CPU in order to lower consumption seems to be OK but the CPU2 for BLE seems to be always active.LL_C2_PWR_SetPowerMod...

SMPS - Danger the device may be destroyed

Hi all,I read this advertising in the datasheet:<<The SMPS needs a clock to be functional. If for any reason this clock stops, the device maybe destroyed.[...]Danger: Before enabling the SMPS, the SMPS clock detection must be enabled in the sub-GHz r...

Resolved! Help debugging power consumption in low-power modes on an stm32wle target

Hi!I have a custom board built around an STM32WLE5CCU7.My problem is that it consumes way to much power (100 times expected).110uA in Shutdown and Standby190uA in STOP2 WFI.CubeMX power tool estimates these two modes to at most 0.640uA and 1.3uA resp...