mirror of https://github.com/arendst/Tasmota.git
hc-sr04 edits
blakadder
parent
8b79a485eb
commit
c20b039fb1
|
|
@ -0,0 +1,38 @@
|
|||
HC-SR04 (HC-SR04P and JSN-SR04T) is an ultrasonic ranging sensor. Provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit. See [HC-SR04 Ultrasonic Sensor](https://www.sparkfun.com/products/13959) for more information.
|
||||
|
||||
Buy example:
|
||||
- [AliExpress](https://www.aliexpress.com/item/4000124226294.html)
|
||||
- [Sparkfun](https://www.sparkfun.com/products/13959)
|
||||
|
||||
## Configuration
|
||||
### Wiring
|
||||
<img src="https://raw.githubusercontent.com/arendst/arendst.github.io/master/media/wemos/wemos_hc-sr04_schematic.jpg" align=right></img>
|
||||
|
||||
| HC-SR04 | ESP8266 |
|
||||
|---|---|
|
||||
|Vcc |5V |
|
||||
|GND |GND |
|
||||
|Trig |GPIOx |
|
||||
|Echo<br>use voltage divider! |GPIOy |
|
||||
|
||||
The HC-SR04 operates at 5V and therefore the echo signal will be 5V as well. Connecting the echo pin via a voltage divider (see schematic) will divide the 5V to 3.3V, which is the operating voltage of an ESP8266.
|
||||
|
||||
There is a variant of the HC-SR04, called HC-SR04P. It mainly operates at 3.3V and then it doesn't need the voltage divider but you will notice a range drop of about 1 meter.
|
||||
|
||||
|
||||
### Tasmota
|
||||
In the _Configuration -> Configure Module_ page assign:
|
||||
1. GPIOx to `SR04 Tri (69)`
|
||||
2. GPIOy to `SR04 Ech (70)`
|
||||
|
||||
|
||||
|
||||
### Tasmota Main
|
||||
After a reboot webUI displays the HC-SR04 distance.
|
||||
|
||||
|
||||
|
||||
Sensor sends a `tele/%topic%/SENSOR` JSON reponse:
|
||||
```json
|
||||
{"Time":"2019-01-01T22:42:35","SR04":{"Distance":16.754}}
|
||||
```
|
||||
|
|
@ -24,7 +24,7 @@ More about [general configuration](Sensor-Configuration).
|
|||
- [**DS3231**](DS3231) - Real-Time-Clock (I<sup>2</sup>C)
|
||||
- [**HM16/HM17**](iBeacon-driver) - Bluetooth iBeacon reader (serial)
|
||||
- **HR-E** - Water Meter Encoder interface (serial)
|
||||
- [**HC-SR04 (SR04+, SR04T)**](Wemos-D1-Mini-and-HC-SR04-Ultrasonic-Sensor) - Ultrasonic Sensor
|
||||
- [**HC-SR04 (HC-SR04P, JSN-SR04T)**](HC-SR04) - Ultrasonic Sensor
|
||||
- [**HC-SR501**](PIR-Motion-Sensors#HC-SR501) - PIR Motion Sensor<img src="https://user-images.githubusercontent.com/5904370/53279530-8c571600-3711-11e9-85c0-27d35be2df48.png" width="200" align="right" />
|
||||
- **Honeywell HIH** - Temperature and Humidity sensor (I<sup>2</sup>C)
|
||||
- **Honeywell HPMA115S0** - Particulate Matter Sensor (serial)
|
||||
|
|
|
|||
|
|
@ -17,7 +17,7 @@
|
|||
- [**DS3231**](DS3231) Real-Time-Clock (I<sup>2</sup>C)
|
||||
- [**HM16/HM17**](iBeacon-driver) Bluetooth iBeacon reader (Serial)
|
||||
- **HR-E** Water Meter Encoder interface (Serial)
|
||||
- [**HC-SR04 (SR04+, SR04T)**](Wemos-D1-Mini-and-HC-SR04-Ultrasonic-Sensor) Ultrasonic Sensor
|
||||
- [**HC-SR04 (SR04+, SR04T)**](HC-SR04) Ultrasonic Sensor
|
||||
- [**HC-SR501**](PIR-Motion-Sensors#HC-SR501) PIR Motion Sensor<img src="https://user-images.githubusercontent.com/5904370/53279530-8c571600-3711-11e9-85c0-27d35be2df48.png" width="250" align="right" />
|
||||
- **HTU21** Temperature and Humidity sensor (I<sup>2</sup>C)
|
||||
- **HX711** Load Cell sensor (GPIO)
|
||||
|
|
|
|||
|
|
@ -1,35 +0,0 @@
|
|||
## HC-SR04 Ultrasonic Sensor
|
||||
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/hc-sr04-ultrasonic-sensor-blue.jpg" align=right width=200>
|
||||
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/hc-sr04-ultrasonic-sensor-red.jpg" align=right width=225>
|
||||
|
||||
"This is the HC-SR04 ultrasonic ranging sensor. This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit." See [HC-SR04 Ultrasonic Sensor](https://www.sparkfun.com/products/13959) for more information.
|
||||
|
||||
Buy example:
|
||||
- [AliExpress](https://aliexpress.com/item/Free-shipping-1pcs-Ultrasonic-Module-HC-SR04-Distance-Measuring-Transducer-Sensor-for-Arduino-Samples-Best-prices/690139020.html)
|
||||
- [Sparkfun](https://www.sparkfun.com/products/13959)
|
||||
|
||||
### Connecting the HC-SR04 to a Wemos Mini D1
|
||||
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/wemos_hc-sr04_schematic.jpg" align=left width=600>
|
||||
|
||||
| Wemos | HC-SR04 |
|
||||
|---|---|
|
||||
|GND |GND |
|
||||
|5V |VCC |
|
||||
|D6 (gpio12) |Echo via voltage divider |
|
||||
|D7 (gpio13) |Trigger |
|
||||
|
||||
The HC-SR04 operates best at 5V, therefore the echo signal will be 5V as well. Connecting the echo pin via a voltage divider (see schematic) will divide the 5V to 3.3V, which is the operation voltage of the Wemos D1 Mini.
|
||||
Please note there is a variant of the HC-SR04, called HC-SR04P. It mainly operates at 3.3V and then it doesn't need the voltage divider but you will notice a range drop of about 1 meter.
|
||||
|
||||
### Tasmota Configuration
|
||||
In the Configuration -> Configure Module page, select the following:
|
||||
1. **Module Type : 18 Generic**
|
||||
2. **D6 GPIO12 : 70 SR04 Ech**
|
||||
3. **D7 GPIO13 : 69 SR04 Tri**
|
||||
|
||||
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/wemos_hc-sr04_config_marked.jpg" width=300>
|
||||
|
||||
### Tasmota Main
|
||||
After reboot of the device the displays the HC-SR04 distance.
|
||||
|
||||
<img src="https://github.com/arendst/arendst.github.io/blob/master/media/wemos/wemos_hc-sr04_main_marked.jpg" width=300>
|
||||
Loading…
Reference in New Issue