How to get started

[admin]

check PCB point, 5v and 3.3v point, whether well.

[Lomagno]

Thank you for your summary!

I am a fresh user of an KC868-A16 REV:1.6 and your instructions save me a lot of time. Same as you, the first time I powered the unit the RF boards were installed and nothing worked until I removed them. As far as I could notice, no smell and no damage detected due to this.

Unfortunately in my case, WiFi AP is still not discoverable after step 5 of your sequence (power off/power on). Indeed, when the USB-C cable is plugged, from 5 to 5 seconds my PC beeps and the PCB's led quickly dims, ie, the unit appears to be disconecting/connecting (shoud I keep the USB-C cable unplugged?). This happens either with firmware KC868_16_V2.2.2.bin or the newer KC868_16_v.2.20.bin and with the USB-C cable plugged or not. I have not tried to access the board over the Ethernet.

Any additional hints, please?

Any help from the admin will also be welcomed!

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Previous post:
Ehh, ok, finally figured this out, so I'll write a quick summary - hopefully someone will find it useful.
Brand new board, first power up:
1) Downloads:
USB driver firstly: https://www.kincony.com/download/CH341SER.zip
Firmware flash tool: https://www.kincony.com/wp-content/uploa..._3.9.2.zip
Latest firmware: https://www.kincony.com/forum/showthread.php?tid=3791
2) Install USB serial driver
3) Prepare board: if you have radio transmitter and received - remove it
Connect USB cable
Connect 12V power
4) Flash the firmware according to instructions:
https://www.kincony.com/esp32-kcsv2-firmware.html
5) Power down, power up the board. Clicking the reset button is NOT enough.
6) For me, after these steps, finally the AP appeared on list of WiFi networks and I could connect to http://192.168.4.1

[admin]

ok, good.

[Lomagno]

check PCB point, 5v and 3.3v point, whether well.

Thank you for your fast response!

PCB check point 5 V running steadily at 5.02 V
PCB check point 3.3 V running at ~3.12 V peaking to 3.20 V every 5 seconds, when the PCB´s power LED slightly dims

PCB malfunction? Incorrect firmware?

PS: I also have a KC868-A4 rev 1.2.5, which does not have any setup problems with its corresponding firmware. So I believe I am following the correct procedures

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check PCB point, 5v and 3.3v point, whether well.

Additionally, the PCB 12 V check point is running steadily at 11.81 V.
Source voltage 12.13 V

[admin]

after download KCS v2 firmware, whether all function work well?