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项目作者： 13xiaobang

项目描述 ：
porting lm75a(temperature sensor device) into esp32
高级语言： C
项目地址: git://github.com/13xiaobang/esp32_lm75a.git
创建时间： 2018-07-15T10:12:44Z
项目社区：https://github.com/13xiaobang/esp32_lm75a
开源协议：
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ESP32_LM75A README

Description:

This is a LM75A temperature sensor device driver for ESP32(ESP32-DevKitC).

Setup HW environment

connect ESP32 and LM75A like this:

LM75A sensor Despriction ESP32 (demo)
VCC Power PIN GPIO2
GND GND GND
SDA A4 (I2C SDA) GPIO 18
SCL A5 (I2C SCL) GPIO 19
A0 GND (or VCC to increase I2C address of 1) None
A1 GND (or VCC to increase I2C address of 2) None
A2 GND (or VCC to increase I2C address of 4) None
OS Interrupt PIN GPIO4



Setup SW environment

  1. Clone esp-idf and setup it as guide.
  2. Clone esp32_lm75a
  3. cd esp32_lm75a
  4. make menuconfig
  5. make && make flash

Use the esp32_lm75a demo

esp32> lm75a init
I (36803) gpio: GPIO[2]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (36803) gpio: GPIO[4]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:2
esp32> lm75a temp
lm75a_read_temperature=26.5
esp32> lm75a set_tos 30
lm75a_set_tos: 30
esp32> lm75a set_thys 29
lm75a_set_thys: 29
esp32> lm75a set_int 1
lm75a_set_int: 1
init_os_gpio!

(make temperature high enough to 30)
esp32> GPIO[4] intr, val: 0(interrupt happened) (make temperature go down below 29)
esp32> GPIO[4] intr, val: 0 (interrupt happened)

esp32> lm75a set_int 0
lm75a_set_int: 0
deinit_os_gpio!
quit gpio_int_task
esp32> lm75a deinit
deinit_os_gpio!