@FANG Python 多线程也是鸡肋般的存在
小组相关帖子:
https://talk.quwj.com/topic/2008
https://talk.quwj.com/topic/2021
https://talk.quwj.com/topic/2017
@RaspiSQH 没有实体店,电子荒漠
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。
可以用来做点啥好
微信群里做成的那位不是你么
晚上推到重来,做了一个新的设计。
让一个底板同时兼容ESP8266和ESP32模块。
很可能要延至年后打样了,争取年前吧。
长得像顶级域名的二级域名
夜深了,年轻人不要老熬夜
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).
引脚悬空就是这样的。需要接外围电路
@九年吃菜粥 和 arduino 的国产兼容板相比,暂时没有什么优势,要说的话,官方版本价格有优势。arduino 官方版本价格不菲。
@RaspiSQH 估计是系列中首款产品,试试水
然后要加内存的话感觉会很快,参考树莓派1G到8G用了几个版本迭代就实现了,EMMC 也到了 32G。
配合大内存的树莓派作为主控来用也是一个选择。
微积分
@Tony 大概是的
@RaspiSQH 缺货,然后淘宝各商家已经限购了。小确幸估计 3 月左右发吧如果到时候有货的话。
挺好看的啊,对温度有要求吗
@wuli https://www.raspberrypi.org/forums/
官方论坛这是