"KCS" v3.9.1 firmware BIN file download

[admin]

v3.9.1 improvement:
1. fixed bug with KC868-A16v3 digital input ports.
2. fixed bug with DHT22 sensor.

[twostar]

I can confirm that the inputs now work again with 3.9.1, however I'm still getting an all-zero reading from the DHT22.  Just to check, is this the correct Sensor setup for the DHT22?

   

[admin]

because you need set the GPIO number, now you have not fill it, you have selected "NONE", it should be have a NUMBER. for example, my photo diagram, set GPIO 47. actually my DHT22 sensor work with 3.3v power is ok.
   
   

[twostar]

because you need set the GPIO number, now you have not fill it, you have selected "NONE", it should be have a NUMBER. for example, my photo diagram, set GPIO 47. actually my DHT22 sensor work with 3.3v power is ok.

Thanks, now it works OK.  I was checking because previously if I set the GPIO to anything other than "None" it bricked the board and I had to reflash it to recover.

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An update, I've checked and it works at both 5V (from the 433MHz connector) and 3V from the GPIO pins, in both cases it takes several minutes to first get a reading, so shows readings of 0 for awhile before it shows the actual values.

[twostar]

Another update, there are two different types of DHT22 sensors, the raw sensor with 4-pin connectors and a DHT22 module with 3-pin connectors and built-in pullup resistor.  I've just tested the second form and that also works now, with either a 5V or 3V feed.  In fact it works a lot better than the 4-pin DHT22, it's reported almost immediately by the board rather than only after several minutes, and it updates continuously rather than being frozen.

[admin]

maybe some sensor need use by 5v power is better, because it according to the sensor's inside pcb design.

[twostar]

I got the same results from 3V and 5V, the real difference was between the 4-pin and 3-pin modules.  The one I have is completely enclosed in a plastic case but the circuit diagram is probably this (without the LED):

   

So it's got an additional pullup (alongside the ones on the board) which is fine since you can use a wide range of values for it, and a decoupling capacitor.  Whatever the case, this configuration works a lot better than just the raw DHT22 sensor.

If anyone else has any experience with this it'd be interesting to hear about them, there's so many DHT22 variants that it could be luck rather than the module design that has the 3-pin module perform better.

[admin]

thanks for feedback.

[Smithgrind]

I bought an A6-V3 board and installed firmware version 3.9.1, but I can't see the wifi hotspot. 
The firmware installation process seems to have been completed successfully (see attached print screen). An observation: there is LCD, but it doesn't show any information. Is this normal?

[admin]

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