use the SPI interface of OrangePi One/Zero to attach a MAX6675 thermcouple.
The MAX6675 connects to OPi One as:
| MAX6675 | One GPIO |
|---|---|
| VCC | PIN17 |
| GND | PIN20 |
| SCK | PIN23 |
| CS | PIN24 |
| SO | PIN21 |
need spidev module
pip3 install spidev
But it is very very noisely, don't use. 测量数据噪音太大了，没有任何实际用处。
连接一个GPS模块做NTP授时服务器。
use GPS module connected to UART, read GPS time and feed to NTP as a Time base. need a GPIO PIN to receive GPS PPS pulse.
I use gpsd to receive GPS data, so must setup the actual UART port in /etc/default/gpsd. GPSD will send the GPS timestamp to ntpd by SHMEM, so setup the /etc/ntp.conf
maybe need fix the /lib/systemd/system/gpsd.socket to allow network remote access GPS data:
ListenStream=0.0.0.0:2947
use a DS18B20 connected to 1-Wire i/f, and my remote ds18b20 linked by bluetooth
早期方案，DS18B20连接在一个单片机上，单片机再用蓝牙模块把数据发送到OrangePi One 上，用这里的perl脚本送服务器。 单片机和蓝牙的可靠性太低了，反正家里好几个闲置的OrangePi Zero，就把DS18B20接到Zero的GPIO上，用Python脚本读并送入数据库。 owserver还能把DS18B20远程接入到HomeAssistant 这里几个perl脚本就只有存档价值了。