About ABrua.1

ABrua.1 · 2023-05-25

Hello,I would like to power an STM32WLE5 with two voltage levels:VBAT: 2 series AA batteries, yielding a voltage comprised between (~3.2V and ~2V) over the life of the batteries.VBOOST: A boosted voltage from the batteries with a target of 3V. If the...

ABrua.1 · 2021-06-15

Hello,The datasheet for STM32WB55RG (DS11929, 3.6.1 RF front-end block diagram, page 22) states that the output power is user programmable:"In Transmit mode, the maximum output power is user selectable through the programmable LDO voltage of the powe...

ABrua.1 · 2020-10-16

Greetings,On the custom board I'm working on, the HTS is powered off (electrically) when unused. The rail used to power the HTS can't remain on because it also powers other components which must be powered off to meet the consumption target.I noticed...

ABrua.1 · 2021-06-21

After a brief exchange with ST support:TX power after reset is 0 dBmname must be "wpan0"tx_power is the level in dBm, in the range [-20, +6]For example, to set the maximum tx power: if( ZbNwkIfSetTxPower(zigbee_app_info.zb, "wpan0", 6) ) { APP_...

ABrua.1 · 2021-06-16

Thank you. I forgot to say I am using the Zigbee stack. I assume from your answer that the TX power is set by the M0 coprocessor and accessible only via the stack's specific API. Your answer hinted that I should look into the ZSDK API documentation (...

ABrua.1 · 2020-10-27

In my case, there is 12.3µF decoupling in total which is WAY over the top, I suppose. Scope verification shows that Vdd reaches 3V in 5µs, so I would assume this is of no significance for startup time.

ABrua.1 · 2020-10-27

Hello,I update this thread to indicate that my problem has been resolved by adding a 350ms delay between powering the sensor and the first I2C communication. This solution only comes from empirical evidences. I wish ST had provided a maximum power up...

ABrua.1 · 2020-10-20

Hi @Eleon BORLINI ,Thank you for your answer. I have checked the I2C parameters:The sensor is powered by a set of two AA alkaline battery, so Vdd is somewhere between 2.7V and 3.2V, depending on battery charge. The clock frequency is 100kHz. SCL and...

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Is it possible to power an STM32WLE5 with variable voltage ?

RF transmit power on STM32WB with Zigbee stack

How long does it take for the HTS221 to be operational after being powered ?

Re: RF transmit power on STM32WB with Zigbee stack

Re: RF transmit power on STM32WB with Zigbee stack

Re: How long does it take for the HTS221 to be operational after being powered ?

Re: How long does it take for the HTS221 to be operational after being powered ?

Re: How long does it take for the HTS221 to be operational after being powered ?