Electronic Scale 1.0

1.Electronic scale information

Electronic scale information table

Host Model	D1w
Measuring range	100g-15kg/30kg(Double range)
Certified division value	5g/10g
Safe overload (%FS)	120
Destroy overload (%FS)	150
Working temperature (℃)	-10℃～40℃
Working humidity	10%～85% No condensation
Creep(%FS/30min)	+-0.02
Equipment dealer/model	W23
Porter rate	9600
Access mode	Serial(/dev/ttyS4)

2. Measurement quantity related basic knowledge

Boot zero point/zero clearing

After the power on of the electronic scale weighing AD system, read the weight quantity signal and save it as the reference point of boot, namely the boot zero point.

Manual zero clearing

After the electronic scale has obtained the boot zero point, if an article with a range less than 2% of full range is placed on the scale pan, it can be cleared with a command, with a weight quantity of 0.

Tare weight

Tare weight is applied for goods with package. The weight quantity of the package should be excluded when calculating the price. At this time, you may first place the package onto the scale pan, conduct the tare removal operation. Then the weight quantity of the package is namely tare weight. You may also directly input the set package tare weight without weighing.

Weigh with tare removal

It is operated by weighing in and out. Packing the goods on the weighing plate, as a slave weight removed, the net weight should be 0, the slave weight should be the packing weight.

Digital tare removal

Tare removal operation with direct setting input without weighing

3.Electronic scale software development

The method of application

Link Electronic scale sdk downloads

Binding the electronic scale service to obtain relevant data for the electronic scale

Initialization

Open the serial port and obtain the net weight and state of the electronic scale by means of an interface callback

Electronic mElectronic = new Electronic.Builder()
//default path
.setDevicePath(“/dev/ttyS4”)
//default porter rate
.setBaudrate(9600)
.setReceiveCallback(new ElectronicCallback {
@Override
public void electronicStatus(String weight, String weightStatus) {
//Callback in child thread
  ...
}})
 .builder()

Electronic Parameters

Parameters	Description
Weight	Unit(kg)
scale state	46:overweight, 53:Normal, 55:unstable, 56:Successful manual peeling, 57: Failure of manual peeling

Get the function of zero clearing and peeling of electronic scale by direct calling method

• zero clearing

  mElectronic.turnZero()

• Weigh with tare removal

  mElectronic.removePeel()

• Manual peeling

  mElectronic.manualPeel(int peelWeight)

• Turn off the electronic scale

  mElectronic.closeElectronic()

Hybrid uses WebView to call the scale

Demo source code

JavaScript API to call the scale

iMin provides electronic scale service plug-in, users can search for iMinprinter plug-in through iMin App Store, download and install, and print web content through the browser using the electronic scale function.

Demo Case(You can open your chrome browser and enter the URL below to experience.)

https://mp.imin.sg/ElectronicScale/index.html

Use JavaScript API

Establishing a connection can be done in the following 3 steps:

1. Download the JS library file Download the JS library

2. Add the js file to your project

3. Initialize the connection

1. Get the scale weight

Function：void electronicScaleGetWeight()

//Initialize the connection
var IminPrintInstance = new IminPrinter();

IminPrintInstance.connect().then(async (isConnect) => {
    if (isConnect) {
        var weight = 0;
        // Get the scale weight
        IminPrintInstance.electronicScaleGetWeight(function (data) {
            // alignmentMode   Scale status code： 53=normal； 46=overweight； 55=No Stable Weight
            // weight  The weight of the item that the scale currently weighs
            if (data.alignmentMode === 53) {
                weight = data.weight;
                console.log('weight：'+ weight);
            } else {
                if (data.alignmentMode === 46) {
                    console.log('Exceeding maximum weight');
                } else {
                    console.log('The state is unstable');
                }
            }
        })
    }
})

parameter：

alignmentMode –> Scale status code： 53=normal； 46=overweight； 55=No Stable Weight weight –> The weight of the item that the scale currently weighs

2. Electronic scale peeling

Function：void electronicScaleRemovePeel()

IminPrintInstance.electronicScaleRemovePeel();

3. Zero the electronic scale

Function：void electronicScaleTurnZero()

IminPrintInstance.electronicScaleTurnZero();

4. End of weighing

Function：void electronicScaleEnd()

IminPrintInstance.electronicScaleEnd();

Electronic Scale 2.0

1. Framework

It adopts built-in electronic scale service and external reference SDK jar package. The functions and compatibility of the electronic scale are adapted by internal services, and the developer only needs to call the standard interface of the jar package. The iterative maintenance of the built-in electronic scale service can be independently upgraded by the platform without additional development by the customer.

2.Electronic scale information

Electronic scale parameter

Host Model	Swan 2 (Scale)
Measuring range	6kg≤Max≤15kg
n(Grade)	3000 (III)
Certified division value	2/5g
Working temperature (℃)	-10℃～40℃

3. Quantitative correlation

#1. Zero

Every time the smart electronic scale is re-powered, the electronic scale will automatically record the initial zero point as a reference for subsequent weighing. The zero point range for a power-on restart is usually 10% of full scale. When the weight exceeds 10% of the full scale, the electronic scale will not be able to find the zero position. For example, for a 15kg electronic scale, if the weight of the pan exceeds 1.5kg when the machine is turned on, the electronic scale will not be able to find the zero position. If the weight is less than 1.5kg, the electronic scale will default to start weighing from zero. We recommend that you empty all the items on the pan before powering it on.

#2. Manually clear/zero Settings

In daily weighing, if you need to return to zero, you can manually clear the zero back to the initial zero position. The range of manual zeroing is 2% of full scale. For a 15kg electronic scale, the range of manual zeroing is 298g. For example, after you clean the pan, the weight may show up as -0.004kg. When you click the Clear button, the weight display will return to "0.000kg". Note: In the case of tare, the Clear button will not work.

#3. Peel/peel

During the weighing process, if the weight of the product packaging needs to be removed, it can be performed by peeling. The weight of the peel will affect the weighing range. For example, if a 15kg electronic scale is set with a tare of 5kg, then the remaining weighing range will be only 10kg. Weighing and peeling: First put the package on the scale, click the peeling button, the weight of the package will be automatically recorded as tare weight; Preset tare if you know the package weight, you can manually enter the tare value; For multi-range electronic scales, the maximum peeling weight is usually Max1-e1. For example, for a 6/15kg electronic scale, the maximum tare is -5.998kg. Note: The value of preset tare must be set accurately. First, the value of the preset tare must be less than the maximum tare; Secondly, the preset tare value must be set according to the correct index value. For example, for a 6/15kg (n=3000) electronic scale, the preset tare value of 6.005kg or 0.019kg is not correct.

#4. Net weight

Net weight refers to the value of the weight that the consumer should pay for the product. If the product comes with packaging, it is necessary to remove the packaging as tare first.

#5. Gross weight

Gross weight = tare + net weight

4. Electronic scale service usage

#1. Downloading the SDK

Link Electronic scale sdk downloads

#2. Initialize SDK

After importing the jar package.

implementation files('libs/iMinEscale_SDK_V1.0.0.13_20250217.jar')

Connect the imin electronic scale service, when the service is connected, you can use the various functions in the SDK.

ScaleManager scaleManager =  ScaleManager.getInstance(context);
              //iMin Scale service
              scaleManager.connectService(newScaleManager.ScaleServiceConnection() {
              
              @Override
                public void onServiceConnected() {
                //Service binding
                  }
              @Override
                public void onServiceDisconnect() {
                //Service unbundling
                  }
                }             
            

Message warning tips

In order to strengthen the privacy protection policy, Android 11 introduced many changes and restrictions, including changes in package visibility, which will prevent third-party applications from successfully initializing the SDK.

In particular, it should be noted that this change in Android 11 will only affect apps that upgrade targetSdkVersion=30, and apps that have not been upgraded will not be affected for the time being

#3. For more details ，please download the developer document

Link developer document