projects:xiaomi-flora
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projects:xiaomi-flora [2016/10/31 21:43] – emeryth | projects:xiaomi-flora [2020/02/12 16:16] (current) – emeryth | ||
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- | ====== Xiaomi Flora Flower | + | {{template>: |
+ | | name=xiaomi-flora | ||
+ | | status=completed | ||
+ | | founder=[[user> | ||
+ | | repo= | ||
+ | }} | ||
+ | |||
+ | ====== Xiaomi Flora Plant Monitor teardown and analysis ====== | ||
by [[people: | by [[people: | ||
This is a teardown and analysis of the Xiaomi flower/ | This is a teardown and analysis of the Xiaomi flower/ | ||
- | It is not extremely in-depth because the main goal was to figure out how to use the device without the official app. | + | The analysis |
**Note:** While writing this down, I have found out that I am not the first to publish something about the device ( https:// | **Note:** While writing this down, I have found out that I am not the first to publish something about the device ( https:// | ||
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{{: | {{: | ||
+ | ==== Pin header ==== | ||
+ | |||
+ | |2 ???|4 SW_CLK|5 SWDIO|8 GND| | ||
+ | |1 VBATT|3 ???|6 ???|7 GND| | ||
==== Chips on the PCB ==== | ==== Chips on the PCB ==== | ||
Line 62: | Line 73: | ||
**0x0033** - You need to write **0xA01F** to this handle to enable real-time data reading | **0x0033** - You need to write **0xA01F** to this handle to enable real-time data reading | ||
- | **0x0035** - The actual data from the sensors, can be rad only after you enable real-time data, otherwise returns zeros | + | **0x0035** - The actual data from the sensors, can be read only after you enable real-time data, otherwise returns zeros |
Example data frame, values are little-endian | Example data frame, values are little-endian | ||
^f7^00^10^13^00^00^00^25^f5^04^02^1c^40^fb^34^9b^ | ^f7^00^10^13^00^00^00^25^f5^04^02^1c^40^fb^34^9b^ | ||
- | | Temperature | + | | Temperature || ?? | Light intensity |||| Moisture | Fertility || ?? | ?? | ?? | ?? | ?? | ?? | |
+ | |||
+ | Notes: | ||
+ | * Temperature is signed 16-bit value in tenths of degrees C, so 265 means 26.5 °C | ||
+ | * Light intensity in lux, not sure if 32-bit | ||
+ | * Moisture in percent | ||
+ | * Fertility in µS/cm | ||
+ | |||
+ | **0x0036** - writing **0x0100** to this handle will subscribe you to sensor value notifications | ||
Here is a short Python script to get all the interesting data from the device: | Here is a short Python script to get all the interesting data from the device: | ||
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print "Soil fertility:", | print "Soil fertility:", | ||
</ | </ | ||
+ | |||
+ | ==== Historical data ==== | ||
+ | |||
+ | The device stores historical data when not connected that can be later synchronized. | ||
+ | |||
+ | I have not figured it out yet, but looking at the dumps it seems to work by writing an address to handle 0x003e and the reading data from handle 0x003c. | ||
+ | |||
+ | |||
+ | ===== Firmware hacking ===== | ||
+ | |||
+ | I have no interest in changing the firmware, since you can already get all data you need from the original firmware. | ||
+ | |||
+ | But if you really want to know, the device supports OTA firmware update and there is a header with SWD on the PCB, although I was unable to connect to the cpu using OpenOCD. | ||
projects/xiaomi-flora.txt · Last modified: 2020/02/12 16:16 by emeryth