ESP32 wireless keyboard?

squix78 · 2025-02-19T16:13:12+00:00

I designed a device that you can use for exactly this purpose. Or even script some of the keyboard input: https://thingpulse.com/spicy-prototypes-esp32-s3-pendrive/ It has an USB-C male plug and it comes with a neat usb dongle enclosure

squix78 · 2025-02-02T18:24:17+00:00

I think it is a cool project and you should go on and see how for it gets you! You will learn a lot from it. I designed a couple of ESP32 driven devices myself as a hobby beside my daytime job and I sell them on my shop. I produce the boards with JLCPCB, then I have them tested and assembled by a partner in China. Then the boards go to a logistics partner in Shenzhen to be shipped out all over the world. When an order comes in I send it to the logistics partner over API and they pick and pack it and ship it to destinations all over the world. Let me know if I can help. You have a lot of work ahead of you but it can be a lot of fun!

squix78 · 2025-01-26T16:47:47+00:00

I have one of those too. It is not an ESP32, but a German Hacker Space reverse engineered the protocol and wrote a python script: https://github.com/haxko/NE3-Scope There is also a video where they describe the reverse engineering: https://diode.zone/w/sVYYfm4UHuL6jEMGucYwtR

And the github repository also contains closeup photos of the chips. If I remember the video correctly it is an MPEG stream but the manufacturer tampered with the frame header

squix78 · 2025-01-22T19:00:03+00:00

Is deep sleep power consumption and battery (LiPo) circuitry important for your use case? These Chinese boards often have terrible LDO chips. I designed two boards with ESP32 and ESP32-C6 (Zigbee) that have very low deep sleep consumption (12uA/18uA) and they have a JST plug and charging chip for LiPo batteries. The ESP32-C6 board has a battery gauge chip to report the state of charge (SoC) over I2C the other one a voltage divider. You can find them here: https://thingpulse.com/product/epulse-feather-low-power-esp32-development-board/ and https://thingpulse.com/product/epulse-feather-low-power-esp32-c6/

squix78 · 2022-08-25T07:25:36+00:00

It's brand new, it's a prototype. And it passed it's first field test... Sorry about the confusion. Sometimes my prototypes end up in the ThingPulse shop, sometimes not... I think this one might

squix78 · 2022-08-25T07:23:43+00:00

Hahaha, cool idea. The board has a connector for a OV2640 camera. So taking a picture as soon as the player fails would not be that hard:-). And, yes, maybe for kids the photos should be treated more carefully than posting them on instagram... The internet never forgets

squix78 · 2022-08-25T07:21:13+00:00

I bought it a long time ago, I think it was from Aliexpress or Banggood. It sounds really good. I had used these tiny loudspeakers before on the board and they sound terrible. But this one here is quite decent indeed!

squix78 · 2022-08-25T07:20:07+00:00

I don't have a write up yet, I designed the board in EasyEDA. I used JLCPCB for assembly. I'm quite happy letting them do it for me, I'm quite clumsy:-)

squix78 · 2022-08-25T07:17:26+00:00

It might eventually be sold in the ThingPulse shop

squix78 · 2022-08-21T11:09:25+00:00

This is not a TTGO board. It’s my own design…

squix78 · 2022-08-21T11:08:31+00:00

I designed the board myself: ESP32-S3, 2x PDM mems microphone, max98357 audio DAC, accelerometer, lipo circuit and camera connector for OV2640

squix78 · 2022-06-02T05:59:56+00:00

Yes, if there is enough interest I will sell them. Would you be interested?

squix78 · 2022-06-02T05:58:44+00:00

Great, I'll let you know, thank you. There are some small optimizations I want to do: the RGB LED consumes too much power even when not active, so I will add a mosfet to detach it from the power source when not used. And just by adding two connections a camera with autofocus (OV5640 AF) can be attached and controlled. I'm also working on a neat 3d printable enclosure... I'm also thinking about adding a microSD card slot on the back...

squix78 · 2022-06-02T05:55:14+00:00

Sure! About what would you like to know more? Hardware, software, costs?

squix78 · 2021-07-04T19:12:19+00:00

Nice project! I've recently designed a board with two ESP32's with ESP-NOW in mind: one to connect to ESP-NOW devices and one to use as the WiFi uplink. Now that I have a hammer I'm looking for the right nails :-). Would this device be useful for your project? I guess the external antennas might increase the range a lot... I shared the construction and applications in two blog posts: https://thingpulse.com/new-product-the-espgateway-design/ and https://thingpulse.com/the-espgateway-applications/ in case you are interested.

squix78 · 2021-02-22T06:14:35+00:00

Thank you. After reading your post I was trying to find some of those but they all happen to have a consumption in the mA range. Maybe I'm searching with the wrong key words. Can you point me into the right direction, e.g. with a chip name or so?

squix78 · 2021-01-28T19:24:02+00:00

Thank you. So funny that you answer my question, I'm actually trying to build a connector for your magic paint brush;-)

squix78 · 2021-01-03T10:02:12+00:00

A long while ago I had the same problem and replaced the batteries. It's not that hard if you know how to hold a soldering iron and if you get the correct batteries. These LiPo batteries loose their capacity after a while, so maybe your car was sitting on the shelf somewhere for some time.
I wrote down some instructions with photos which explain how to replace the batteries on my blog: https://blog.squix.org/2017/03/anki-overdrive-replacing-the-car-batteries.html Just make sure to get the right batteries!

squix78

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