Good Bee Designs’ Paul Value is again with one other entry within the Bee board household, the Bee Knowledge Logger — a compact gadget tailor-made for energy-efficient information logging and constructed round an Espressif ESP32 microcontroller.
“The Bee Knowledge Logger is a full-featured data-logging beast full of options and designed from the bottom as much as be as vitality environment friendly in deep sleep as doable,” Value claims of the board, “with a deep sleep present round 21uA! With [its] 2 LDOs [Low Drop-Out regulators], one is at all times on to energy the ESP32 in deep sleep and the 2nd shuts off in deep sleep to avoid wasting energy.”
The compact improvement board relies round an Espressif ESP32-S3-MINI-1, a microcontroller which affords two Tensilica Xtensa LX7 microcontroller cores working at as much as 240MHz, an ultra-low-power coprocessor constructed atop the free and open RISC-V instruction set structure, 512kB of static RAM, and radios for two.4GHz single-band Wi-Fi 4 and Bluetooth 5 Low Vitality (BLE) connectivity.
To this, Value has added an Analog Gadgets DS3231 real-time clock with CR1220 battery backup, a microSD slot for information storage, the 2 600mA LDOs, a 1S lithium-polymer battery connector and charging circuit with bodily on/off swap and voltage monitoring, USB Sort-C connectivity for information and energy, plus twin STEMMA QT/Qwiic connectors for enlargement. The rest of the board’s general-purpose enter/output (GPIO) pins, in the meantime, are introduced out to breadboard-friendly 0.1″ headers at both aspect.
The board contains battery assist, STEMMA QT/Qwiic connectors, and an especially low-power sleep mode. (📷: Good Bee Designs)
The Bee Knowledge Logger is way from Value’s first anthophila-themed improvement board. Again in March final yr he unveiled the Bee Movement Mini, a self-contained movement detector constructed across the RISC-V-based Espressif ESP32-C3 module; this was adopted a few months later by the larger Bee Movement, which supplied extra enter/output capabilities and a swap to the ESP32-S2 — dropping Bluetooth assist within the course of.
The Bee Knowledge Logger is now out there from Tindie for $29.99, with a selection of two differently-sized I2C extender board add-ons out there for an extra $2.50 every. Schematics and supply code, in the meantime, might be discovered on GitHub underneath the permissive MIT license.
