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This article will explain in detail how to write the thermometer program of the Internet of things based on Python and JavaScript. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Zerynth as Android and iOS mobile applications, in the Internet of things project, the graphical interface can be rapid prototyping design.

With the help of Zerynth, any mobile phone can be added to the controller as an intelligent object to form the Internet of things system. In particular, by establishing a two-way communication channel, the mobile phone devices connected to it can be managed and controlled.

We will introduce the use of single-chip microcomputer microcontroller to connect Zerynth, the development of a simple but powerful Internet of things thermometer.

Preparatory work

First of all, you need a circuit board and choose the 32-bit microcontroller device supported by Zerynth. We chose Flip&Click Mikroelektronika, which has many of the same properties as Arduino platform products, including the 32-bit AT91SAM3X8E microchip as the core of Arduino Due.

Then select the Temp&Hum Click with temperature (HTS221) and relative humidity sensor to measure the temperature.

Then WiFi PLUS Click is used to connect the circuit board to the Internet. WiFi PLUS Click has MRF24WB0MA-2.4GHz characteristics, can be compatible with IEEE std 802.11 microchip module, and is the controller of MCW1001 which matches the vehicle TCP/IP stack and 802.11 connection manager.

Zerynth download is also the most important point that you need

Zerynth Studio, a powerful development tool for the Internet of things, can use Python embedded programming. Click download.

Zerynth APP .

Assembled Internet of things thermometer

Flip&Click is a derivative of Arduino. On the one hand, it belongs to Arduino, but on the other hand, you will find that it contains four modules of open mikroBUS sockets that are available on a "stand-alone circuit board". In essence, these modules are additional modules for assembling Arduino prototypes, but if the reduction is removed, Flip&Click can barely be applied, but it is necessary to add Temp&Hum and Wifi Plus clicks to slot An and slot B on the circuit board, respectively.

Using Python to program the thermometer of the Internet of things

Reference exampl

Once you have installed Zerynth Studio and created a Zerynth user, you can clone the Zerynth Application Oscilloscope sample. Refer to the following to learn how to clone an example.

Main.py

#

# IoT Thermometer

#

From wireless import wifi

# this example is based on Particle Photon

# change the following line to use a different wifi driver

From broadcom.bcm43362 import bcm43362 as wifi_driver

Import streams

Import adc

# Import the Zerynth APP library

From zerynthapp import zerynthapp

Streams.serial ()

Sleep (1000)

Print ("STARTING...")

Try:

# Device UID and TOKEN can be created in the ADM panel

Zapp = zerynthapp.ZerynthApp ("DEVICE UID", "DEVICE TOKEN", log=True)

# connect to the wifi network (Set your SSID and password below)

Wifi_driver.auto_init ()

For i in range (0Pol 5):

Try:

Wifi.link ("SSID", wifi.WIFI_WPA2, "PASSWORD")

Break

Except Exception as e:

Print ("Can't link", e)

Else:

Print ("Impossible to link!")

While True:

Sleep (1000)

# Start the Zerynth app instance!

# Remember to create a template with the files under the "template" folder you just cloned

# upload it to the ADM and associate it with the connected device

Zapp.run ()

# Read ADC and send values to the ADM

While True:

Sleep (1000)

X = (adc.read (A4) * 100) / / 4096

Zapp.event ({"data": X})

If x > 95:

# send mobile notification

# (there is a limit of one notification per minute per device on the ADM sandbox)

Zapp.notify ("ALARM!", "The value is greater than 95!")

Except Exception as e:

Print (e)

In this example, Zerynth converts the data obtained from the connected circuit board into a visual graphic oscilloscope, and the analog sensor data is generated by "simulating" pin A4.

Import the correct wifi driver and sensor library

As you can see in the comments, the examples are based on particle photon boards and wifi drivers. To use WiFi Plus Click, you must modify the following lines:

From broadcom.bcm43362 import bcm43362 as wifi_driver

Modify to

From microchip.mcw1001a import mcw1001a as wifi_driver

meanwhile

Wifi_driver.auto_init ()

Modify to

Wifi_driver.init (SERIAL2,D24) # slot B

To use the Temp&Hum Click temperature sensor, you need to add the following lines of code to import the library and set up the sensor, which can be seen in the help documentation.

# Import the HTS221 library from stm.hts221 import hts221 temp_hum = hts221.HTS221 (I2C0, D21) # sl

At the same time, in order to read to the sensor, it is necessary to write the following line.

Tmp, hum = temp_hum.get_temp_humidity () # Read tmp and hum

Set SSID name and password

Of course, you also need to edit the SSID name and password of the wifi network you want to connect to:

Wifi.link ("SSID", wifi.WIFI_WPA2, "PASSWORD")

Create and set up a connected device

Now we will create a "connecting device" to associate an instance of "zerynth". Please see the steps in the screenshot below. Check the documentation for more technical details.

The device's certificates (UID and TOKEN) can be copied and pasted directly from the ADM panel of the development tool Zerynth Studio.

"IP" is the IP address of Zerynth ADM. These parameters can be used when the network driver does not support hostname resolution.

Create, upload, and set up templates

Zerynth can run a beautiful graphical user interface made up of HTML, CSS, and JavaScript directly, without the need for Android or iOS code at all!

In addition, the graphical interface of each device is hosted on the Zerynth ADM sandbox and consists of columns of HTML5, Javascript, Css and picture files that can be loaded and displayed on the App. The ADM Javascript library allows applications and connected devices to communicate with each other after Zerynth adds templates.

Click the appropriate "Plus" icon to add the template.

Then upload the template from the directory that contains the template. Note that you can modify the template definition file "index.html" to customize. Here we leave it as it is.

Deployment script

After several modifications, the code looks something like this:

# Zerynth App Oscilloscope from wireless import wifi from microchip.mcw1001a import mcw1001a as wifi_driver import streams import adc streams.serial () # Import the Zerynth APP library from zerynthapp import zerynthapp # Import the HTS221 library from stm.hts221 import hts221 temp_hum = hts221.HTS221 (I2C0, D21) # slot A sleep (1000) print ("STARTING...") Try: # Device UID and TOKEN can be created in the ADM panel zapp = zerynthapp.ZerynthApp ("DEVICE UID", "DEVICE TOKEN", ip = "178.22.65.123", log=True) # connect to the wifi network (Set your SSID and password below) wifi_driver.init (SERIAL2,D24) # slot B for i in range (0Power5): try: wifi.link ("SSID", wifi.WIFI_WPA2, "PASSWORD") break except Exception as e: print ("Can't link") E) else: print ("Impossible to link!") While True: sleep (1000) # Start the Zerynth app instance! # Remember to create a template with the files under the "template" folder you just cloned # upload it to the ADM and associate it with the connected device zapp.run () # Read the sensor and send values to the ADM while True: sleep (1000) tmp, hum = temp_hum.get_temp_humidity () # Read tmp and hum print ("Temp is:", tmp, "Humidity is: Hum) try: zapp.event ({"data": tmp}) except Exception as e: print (e) if tmp > 30: # send mobile notification # (there is a limit of one notification per minute per device on the ADM sandbox) try: zapp.notify ("ALARM!", "High Temperature!") Except Exception as e: print (e) except Exception as e: print (e)

Keep in mind that the device UID, device token, name, and password must match your own parameters.

After writing, you can deploy the steps to your device.

View the Internet of things thermometer dashboard on the Zerynth application

In this minimalist tutorial, you just need to open the Zerynth app, log in and select the specified device to view the corresponding Internet of things thermometer dashboard. Zerynth can also receive push notifications through a connected device. For example, when the temperature is higher than the threshold, a notification will appear.

Based on Python and JavaScript how to write the Internet of things thermometer program is shared here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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