Low power consumption

[msfujino]

Hi 6kabum9,
The following link may be helpful, it uses I2C connected sensor.

XIAO_BLE wakes up from System_ON_Sleep and Writes weather data to on-board Flash

In post 6, I did not know how to release the internal Flash from DeepPowerDown mode (DPD), so I used it without DPD. As a result, the current during the sleep period only dropped to 26uA. Since post 7, we have discussed how to release from DPD, and I have confirmed that Flash will release from DPD using SPIClass. Also, the BME280 breakout board had a mounted LDO and level shifter, which consumed current, so I changed to a breakout board that did not have these mounted. With these measures, I…

The following link shows how to transmit data at low power.

System_ON_Sleep of XIAO BLE

This is a continuation of my experiments to reduce the current consumption of Peripheral by using SystemONSleep in a project designed as a data logger that periodically sends small amounts of data to Central. Previously, in post #31, I reported that the current was reduced to 20uA by putting 8 bytes of data on the Advertising without a connection. In a subsequent study, The length of transfer data can be increased to 59 bytes by using Scan Response, I found that the current can be reduced to…