dht时间长了湿度漂移很严重，我的买了两年的湿度已经挂了😂

我在树莓派上接了个am2301，现在还很准确。

又加了个 DS18B20 对比，感觉两个都不准。考虑换成 DHT22

@Spoony 看上去挺暖和。
是micropython还是lua或c？

我这里有am2301记录的数据，有的时候有错误和缺漏。窗台上测的，实际温度比这个低。
http://echocraft.top/dht/

@RaspiSQH C 实现的。
你是用树莓派？

手工焊了半成品

@Spoony 嗯，是树莓派

@RaspiSQH 可以考虑改用这个树莓派 ：）
https://talk.quwj.com/topic/2008

@Spoony 233现在能用mcu的都在树莓派上，树莓派经常宕机

换成 DHT22 对比了一下 DHT11，温度基本上一致。湿度数值与 DHT11 相差 3%。


DHT11 vs DHT22
We have two versions of DHT sensor, they look a bit similar and have the same pinout, but have different characteristics. Here are the specs:

DHT11

Good for 20-80% humidity readings with 5% accuracy Good for 0-50°C temperature readings ±2°C accuracy No more than 1 Hz sampling rate (once every second)

Ultra low cost
3 to 5V power and I/O
2.5mA max current use during conversion (while requesting data)
Body size 15.5mm x 12mm x 5.5mm
4 pins with 0.1" spacing
DHT22

Good for 0-100% humidity readings with 2-5% accuracy Good for -40 to 125°C temperature readings ±0.5°C accuracy No more than 0.5 Hz sampling rate (once every 2 seconds)

Low cost
3 to 5V power and I/O
2.5mA max current use during conversion (while requesting data)
Body size 15.1mm x 25mm x 7.7mm
4 pins with 0.1" spacing
As you can see, the DHT22 is a little more accurate and good over a slightly larger range. Both use a single digital pin and are 'sluggish' in that you can't query them more than once every second (DHT11) or two (DHT22).

外壳打样出来了。才发现 OLED 屏幕尺寸是 1.3 寸的，买小了。还是太年轻啊。
又重新订购屏幕，要是在广东就好了，搞硬件研发周期可以成倍缩小。

@Spoony 店里面没有吗？

@RaspiSQH 没有实体店，电子荒漠

@Spoony 啥时候基金会在大陆开点店就好了