How to Print Base64 images through a bluetooth printer

[test-nikko]

Hi folks, I am trying to print a signature image using ionic. I already tried the ionic native bluetooth-serial to print the image but no luck, also I already tried to convert it to binary and send them to the printer.

[masifkhan]

@test-nikko any update on this?

[test-nikko]

I am able to print image using the plugin DatecsPrinter. You can see our discussion here.

Print image using Bluetooth Serial Plugin

Follow these 3 steps… 1-Find bluetooth devices 2-Connect the device with its id 3-Print devices = []; btnFindDevices() { this.bluetoothSerial.isEnabled().then(() => { this.bluetoothSerial.discoverUnpaired().then((allDevices) => { this.devices = allDevices; console.log(allDevices); }); }); } btnBlueToothConnect() { if (this.devices.length > 0) { //this code connects device which’s position is 0. Change it whatever you want. this.bluetoothSerial.connect(this.devices[0].id).subscrib…

[vishwas097]

hello test-nikko, Can i know how you are writing image to printer. Can you display a line of code if possible? Thanks in advance!

[test-nikko]

I have this function for printing image. Hope this would help.

public printImage(printerAddress, base64Img) {
	return new Promise((resolve, reject) => {
		window.DatecsPrinter.connect(printerAddress, () => {
			window.DatecsPrinter.printImage(base64Img.replace(/^data:image\/(png|jpg|jpeg|gif);base64,/, ""),
					200, 200, 1,  () => {
						resolve(true);
					},
					(err) => { resolve(false); })
			},
			(err) => reject(null));
		});
	}

PS. Sorry for the late reply

[vishwas097]

Hello, Thanks for the reply. I tried this way but my printer is not decoding the base64, instead it is printing the base64 text[Not printing the image]. I am not able to identify why? Maybe because the printer emulate only zpl and cpcl. So do you have any idea how can i overcome this issue? Any suggestion will be most helpful. Thankyou.