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@neverdie I guess it might be not to program but to talk to something with SPI from a PC via USB.

This is great, thanks! One suggestion: add a switch mode regulator that can handle 12 or 24 volt DC input. This will allow small sensor devices to hang off a typical bus network having extra pairs for the central power supply.

What is the max ampere capacity of 3.3V battery it can charge ? Is there any upper limit like 1000mAh or 3300mAh like that ?

@rchamp I hope that very soon my SolidWorks will present very interesting enclosures for my devices :). Now this is the number one task. In fact, I stopped developing new PCBs. Now I spend all my free time developing enclosures for finished devices.

This board supports 3 different radios (beside the onboard WiFi, ESPnow of the ESP32): RFM69, RFM95, CC1101, so it can be used as mySensors gateway, mysensors node, Homematic etc. and it has a mySX connector.

If you wish, you may substitute S-1313 ( http://datasheet.sii-ic.com/en/voltage_regulator/S1313_E.pdf) for the MAX8887EZK27 LDO

@berkseo I presume so, but so far I've only confirmed that it works. If running a wireless device, then to be ultra conservative, one would want to have it charge a capacitor, then turn it off before an rx or tx, and then turn it on again. That would be true for any boost converter. Unfortunately, this one doesn't have an enable pin, so you'd have to make your own switch for it in that case. I don't know that it would be needed, but that would be the abundance of caution approach. Either that or make a low pass filter for it if it has any remaining voltage ripple. I haven't measured for that, so I can't say. It may or may not be an issue. Without doing measurements, I couldn't say. Again, that would be true for any boost converter.

Version 4.2 was just published. The board now also contains breakout headers for I2C devices (temperature sensors such as Si7021, HTU21D, SHTT71 and BME280) and a headers for a RXB6 RF 433Mhz receiver. Not tested yet.

@berkseo said in 💬 Touch switch with glass panel (two channels, battery): @neverdie said in 💬 Touch switch with glass panel (two channels, battery): you can add it externally after the fact ... It's not entirely clear, is it adding something to the circuit diagram (hardware)? Or is it a software solution, such as writing a value to a register? Well, it's been a while, so I' going from memory. There's definitely a hardware component for DC-DC that you can see in the datasheet. IIRC, there's also a software enable as well. Really, though, with these chips, the datasheet is your friend for answering most quesitons. There just isn't much other documentation to go by, aside from thread "nrf52 action!",

Hi @talhatec , The remote controls work well. 4 months ago I installed a new battery and from time to time I press the button to check if they continue with battery, they sleep correctly. I remain pending to change the RF antenna for a better one and to improve some failures in the connectors of the battery that at the moment are very fragile (the pad has little copper). The casing can be purchased online https://www.ebay.com/itm/Bluetooth-4-0-GPS-Tracker-Locator-Smart-Alarm-Anti-lost-Device-Self-Portrait-SC/401394156488 For now the project is stopped, I want to test the Aqara sensors (I buy them this week), in any case the domotics is now my lowest priority.

@yoshida hi! Im not sure where you get that #9 should be A5? Looks right to me. The pin is connected to pin 9, and that is D3. [image: 1535522997329-62649016-d746-4ccb-b360-4e8b7ee1405b-image.png] [image: 1535523012953-7f2024c3-afd9-49ee-bb02-95e6e45275a9-image.png] For a rotary encoder, it depends on your input - but don't you want an analog signal in? In that case you use the analog pins. Edit: offcourse, if you use a module converting it to digital like described in the the build section you use a digital pin.

Hello, I want to build this project. But I don't need to power it by batteries. Has anyone the circuit diagram (in FrizIng?) I have also the problem, that I can't see, on the breadboard picture of this project where the red wire from the battery ends after the connection to the Arduino? Does it go to the FET and the R7? Can anyone help me?

There are also other solutions that have I2C bus pins on the shield and if you are going to make a battery powered node, I'd suggest to use an I2C sensor as it will be much more battery friendly

What are the parameters of this radio, I could not get it to work. Suspicions that he had no speed 250.

@lis610 I have found with a 499K resistor the range is reduced to about 1.2m in a ABS box. With a 1Mohm it was about 3m, I do not have many high value SMD resistors to experiment with but the lower the value the lower the range. [image: 1533564348058-img_4277x-resized.jpg] Just tried with a 333K and it operates about 0.8m in free air.