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https://github.com/trombik/bmp280-basic
An example project to create a senor device
https://github.com/trombik/bmp280-basic
bme280 bmp280 esp-idf esp8266
Last synced: 2 days ago
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An example project to create a senor device
- Host: GitHub
- URL: https://github.com/trombik/bmp280-basic
- Owner: trombik
- License: isc
- Created: 2020-06-07T14:27:12.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2020-06-07T19:35:02.000Z (over 4 years ago)
- Last Synced: 2024-10-11T13:41:43.196Z (26 days ago)
- Topics: bme280, bmp280, esp-idf, esp8266
- Language: C
- Homepage:
- Size: 35.2 KB
- Stars: 0
- Watchers: 2
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# `bmp280-basic`
An example project for ESP8266 and `BMP280` and `BME280`.
ESP8266 communicate with the sensor over I2C.
The ESP8266 does:
- Connect to WiFi AP (optional)
- Sync time (optional)
- Read sensor values from `BME280`
- Print values to serial console
- Deep sleep
See `Project configuration` in `make menuconfig` for options.
## Rationales
I want a simple example to make a sensor device. Read values from a sensor,
do something, and sleep. Some devices need WiFi access to send the values to
somewhere. Some devices need synchronized time for display, such as LCD.
## Requirements
The example uses float in `printf(3)`. `CONFIG_NEWLIB_LIBRARY_LEVEL_NORMAL`
must be set to `y` in `sdkconfig`.
## Pins
| ESP8266 | BME280 |
|-----------|--------|
| `GPIO` 4 | SDA |
| `GPIO` 5 | SCL |
Also, connect `GPIO` 16 to `RST` to make `esp_deep_sleep()` to work.
## Example log
```console
ets Jan 8 2013,rst cause:2, boot mode:(3,6)
load 0x40100000, len 7168, room 16
tail 0
chksum 0xed
load 0x3ffe8408, len 24, room 8
tail 0
chksum 0x64
load 0x3ffe8420, len 3540, room 8
tail 12
chksum 0x49
I (61) boot: ESP-IDF v3.2-480-g2524a695-dirty 2nd stage bootloader
I (61) boot: compile time 03:20:11
I (70) qio_mode: Enabling default flash chip QIO
I (70) boot: SPI Speed : 40MHz
I (76) boot: SPI Mode : QIO
I (82) boot: SPI Flash Size : 2MB
I (88) boot: Partition Table:
I (94) boot: ## Label Usage Type ST Offset Length
I (105) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (117) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (128) boot: 2 factory factory app 00 00 00010000 000f0000
I (140) boot: End of partition table
I (147) esp_image: segment 0: paddr=0x00010010 vaddr=0x40210010 size=0x5f294 (389780) map
I (291) esp_image: segment 1: paddr=0x0006f2ac vaddr=0x4026f2a4 size=0x0f694 ( 63124) map
I (313) esp_image: segment 2: paddr=0x0007e948 vaddr=0x3ffe8000 size=0x006d0 ( 1744) load
I (314) esp_image: segment 3: paddr=0x0007f020 vaddr=0x40100000 size=0x00fa0 ( 4000) load
I (324) esp_image: segment 4: paddr=0x0007ffc8 vaddr=0x40100fa0 size=0x05880 ( 22656) load
I (345) boot: Loaded app from partition at offset 0x10000
I (372) system_api: Base MAC address is not set, read default base MAC address from EFUSE
I (376) system_api: Base MAC address is not set, read default base MAC address from EFUSE
phy_version: 1159.0, 85b471e, Apr 21 2020, 17:03:08, RTOS new
I (440) phy_init: phy ver: 1159_0
I (443) reset_reason: RTC reset 2 wakeup 0 store 8, reason is 8
I (448) APP_MAIN: Initializing NVS
I (454) APP_MAIN: Configuring WiFi
I (480) wifi_connect_esp8266: start the WIFI SSID:[makers]
I (483) wifi_connect_esp8266: Waiting for wifi
I (3205) wifi: state: 0 -> 2 (b0)
I (3210) wifi: state: 2 -> 3 (0)
I (3214) wifi: state: 3 -> 5 (10)
I (3216) wifi: pm start, type: 1
I (4209) tcpip_adapter: sta ip: 192.168.99.22, mask: 255.255.255.0, gw: 192.168.99.254
I (4213) APP_MAIN: Configured WiFi. Waiting for WIFI_CONNECTED_BIT...
I (4220) APP_MAIN: Connected to WiFi
I (4226) APP_MAIN: Configuring time
I (4234) APP_MAIN: Current time: 1970-01-01T00:00:03Z
I (4241) APP_MAIN: Time is not set yet. Setting time over NTP
I (4251) init_sntp: Initializing SNTP: mode: POLL server: pool.ntp.org
I (4263) init_sntp: Waiting for system time to be set... (1/10)
I (6267) init_sntp: Current time: 2020-06-07T19:33:34Z
I (6269) APP_MAIN: Configured time
I (6271) gpio: GPIO[4]| InputEn: 0| OutputEn: 1| OpenDrain: 1| Pullup: 0| Pulldown: 0| Intr:0
I (6282) gpio: GPIO[5]| InputEn: 0| OutputEn: 1| OpenDrain: 1| Pullup: 0| Pulldown: 0| Intr:0
BMP280: found BME280
Pressure: 100436.26 Pa, Temperature: 33.79 C, Humidity: 55.38
Uptime 6 sec
Sleeping 30 sec
I (6527) wifi: state: 5 -> 0 (0)
I (6529) wifi: pm stop
E (6532) wifi_connect_esp8266: Disconnect reason : 8
I (6535) wifi_connect_esp8266: Retrying to connect to the AP
```
## License
ISC license unless other license is used in files.
```c
/*
* Copyright (c) 2020 Tomoyuki Sakurai
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
```