4-in-1 temperature, humidity, luminosity wifi sensor and clock NEO NAS-TH02 NAS-CW01W6
This is the teardown of a device providing temperature, humidity and luminosity information through Tuya Smartlife, with Wifi. Another version exists with ZigBee protocol.
This wifi version also provides a clock and date, which is quite practical.
Here is a review of the ZigBee version (without the clock) :
https://www.lesalexiens.fr/labo-test-alexa/te...-capteur-zigbee-simple-complet-et-polyvalent/
Here are photos of the packaging:
To open it, there are no screw, only plastic and glue. I've opened it only with the following opening tool.
I had to force it quite a lot at the bottom and on the left and right sides. Be careful with the top side, as there's the connector going to the screen.
Here is the result once it's open.
One can see that this device uses a bk7231n chip to provide Wifi and bluetooth services.
If one wants to remove completely the board, one has to unsolder the 4 connectors linked to the batteries.
This wifi version also provides a clock and date, which is quite practical.
Here is a review of the ZigBee version (without the clock) :
https://www.lesalexiens.fr/labo-test-alexa/te...-capteur-zigbee-simple-complet-et-polyvalent/
Here are photos of the packaging:
To open it, there are no screw, only plastic and glue. I've opened it only with the following opening tool.
I had to force it quite a lot at the bottom and on the left and right sides. Be careful with the top side, as there's the connector going to the screen.
Here is the result once it's open.
One can see that this device uses a bk7231n chip to provide Wifi and bluetooth services.
If one wants to remove completely the board, one has to unsolder the 4 connectors linked to the batteries.
Comments
Looks like a TuyaMCU device. Doing a packet capture now would certainly help in further configuration: TuyaMCU analyzer - UART packet decoder for Tuya devices - dpID detector [Read more]
Hello, I wish I could do what you suggest, but unfortunately I have fried the bk7231n chip by applying by mistake a 5V voltage. All the rest of the device is working well. So my first step would be... [Read more]
you can probably buy the chip but do you know someone with smd soldering experience? Then you will still have to buy a second device to capture the original firmware from it too. [Read more]
It is relatively hard to replace chip in QFN package, but it's definitely possible. It may be also hard to solder ESP12F in that device, is there even a place for that on the board? I don't think so.... [Read more]