Which module with bluetooth and power outputs, PWM, sensors, etc.

Hello,

I was thinking of designing my own board, where I would give the classic HC-05 bluetooth module and add some elements:

- USB-C connector for power supply
- connector for power supply from batteries
- pulse voltage stabiliser, preferably one that also raises the voltage (when powered from batteries)
- some "power" output, at least around 500-800 mA per channel (e.g. for controlling RGB leds, switching on some other receivers, motors, etc.).
- maybe some version with a relay / triac-optotriac.
- some status leds
- some simple oamp or at least a voltage divider before the ADC, for connecting analogue sensors
- other general connectors, some I2C, general GPIO for connecting various other sensors.


So I could simply design this, not a particularly complicated project, but a little short of time and willingness - and I wonder if someone can recommend a ready project (whether commercial, already put together or in the form of production files), some small board that would offer the mentioned functions and bluetooth transmission?

The HC-05 module operates on the BT2.1 standard, which is now history. Nowadays, these types of projects use BLE introduced in the BT standard from version 4.0 onwards. Today's chips support BT5. BLE-enabled processors and demo kits are plentiful. They usually have an ARM core with multiple peripherals.

The HC-05 was an example. I'm not looking for a BT module or processor but more for some simple board with those functions I described and some (any) BT module.

There's a ton of that out there, which is why I'm asking for recommendations. Also, I'm more interested in "boards" (i.e. something on the level of Raspberry Pi or Arduino) than ready-made modules.

If power consumption is not important then consider using some boards with ESP32. They are relatively inexpensive and there is a very large selection.

ESP32's have terrible power consumption, on average I can see it running very long on battery. There are a lot of BT modules JDY-08, JDY-25, HM-10, HM-11, HM-17 etc.

Otherwise these modules as well as the ESP32 itself is just a board which has a GPIO and that's it. If, for example, I would like to control an RGB tape, I would have to give transistors or some circuit somewhere on another board (e.g. ULN2003) to control a higher current.

I am looking for just such a board that has such things plus some simple conditioning of analogue signals on it.

"Power" outputs,triac-optotriac, relay and battery supply ?
My opinion is that these are conflicting requirements. Processors with BLE draw an average current of several or tens of uA. They are designed for battery power. Occasional communication via I2C with various sensors, flashing an LED does not significantly affect current consumption. Activating a relay, however, requires at least several tens of mA, i.e. thousands of times more.
ESP32-C3 with BLE running will consume surely 40mA. There is also the ESP32-C6 advertised as low power
Plates with ESP are not only GPIO. There are, for example, boards with ESP32 to control 3D printers, UNO D1 Wemos R32 ESP32 boards where you can plug in expansion modules and probably many others I have not heard of.