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刷写大金空气传感器 BRY88AA151K/BRY88AB151K为ESPHome固件,并接入HomeAssistant

Home Page: https://hasstech.cn

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daikin-air-sensor's Introduction

大金空气传感器

下图为BRY88AB151K版,其右上为甲醛扩展侧盖,向后滑动打开;不带甲醛字样的为BRY88AA151K版,不支持甲醛扩展

拆机以及烧录

1.按照图片位置拆下带指示灯的一面,都是卡扣结构,拆开后取出PCB板。

2.将header文件夹中的pm2005.h、pm2105.h和cm1106.h放入ESPHome配置文件夹中,根据传感器型号使用相应yaml编译固件,若没有编译环境,可直接使用firmware文件夹中编译好的factory固件刷写。

3.将Power&IIC排线插到PCB板上,BRY88AB151K版为短接图片中GPIO0两个针脚(其中一个为GND),短接后上电即可进入BOOT刷写模式,然后将图片中的RXD TXD GND连接到USB转TTL刷机板的TX RX GND上,USB插到电脑上,进入WEB ESPHome 烧录固件;BRY88AA151K版刷机原理相同,但是PCB板上貌似没有专门刷机孔,需要短接GPIO0和GND进入BOOT后通过芯片U0 RXTX刷写;进入BOOT后PCB板上的LED灯不亮,若无法烧录可尝试对调RXD TXD针脚或一直短接GPIO0/GND并重新上电。

4.刷写完成后重新上电,连接DAIKIN Fallback Hotspot热点进行配网,CO2传感器启动需要大概3分钟,启动期间数值为550ppm;在进行CO2校准时,请确保放入室外或此时CO2浓度足够低。

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