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LM75 temperature sensor module
This an LM75 on a small board for the Raspberry Pi.
It's not very accurate.
CONFIG
dtparam=i2c_arm=on #dtparam=i2c_vc=on
TOOLS
apt install i2c-tools lm-sensors
TEST
i2cdetect -y 1
0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- 48 -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --
SETUP
echo lm75 0x48 > /sys/class/i2c-adapter/i2c-1/new_device
find /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/ /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/ /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2 /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/device /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/temp1_max /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/subsystem /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/update_interval /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power/runtime_suspended_time /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power/autosuspend_delay_ms /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power/runtime_active_time /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power/control /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/power/runtime_status /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/temp1_max_hyst /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/uevent /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/temp1_input /sys/class/i2c-adapter/i2c-1/1-0048/hwmon/hwmon2/name
watch -n 1 /usr/bin/sensors
MEASURE
Every 1.0s: /usr/bin/sensors lm75-i2c-1-48 Adapter: bcm2835 (i2c@7e804000) temp1: +31.5°C (high = +80.0°C, hyst = +75.0°C) cpu_thermal-virtual-0 Adapter: Virtual device temp1: +38.9°C rpi_volt-isa-0000 Adapter: ISA adapter in0: N/A
