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HDL S57 panel

Review of HDL S57 touch control panel

The documentation was updated on 21.7.2021

HDL is a developer and a manufacturer of building automation and control systems from China. The company was founded in 1985, and at present it is an international company. It specializes in developing and manufacturing high-quality automation products. The company sells its products mainly on European and Asian markets and its products meet high-quality requirements.
HDL is an official partner of iRidium mobile company.

Review of HDL-MTS57.1WI S57 control panel

Firmware version of the reviewed panel is v2.1
Review date 07/20/2019

The size of HDL-MTS57.1WI or S57 panel is 150x81x13.5 mm. It has 5.7` TFT-display with 1280х640 resolution. Pixel densiti of 251 PPI provides iamges of good clarity, but then the vieing angle is changed color rendering and contract are distorted. the panel supports Wifi, Bluetooth and Ethernet (RJ45) to connect to the locat etwork and to the Internet.
The sensor is very responsive, that's why commands, given by touch are done well and clearly.
The device does not have a battery, and it increases its reliabilty, no camera provide privacy. The panel is powered via PoE or under 24V constant voltage.
The panel has a proximity sesor and a light sensor, thanks to which the display is turned o when gestures are detected at a definite distance from the panel.
The device has Android 6.0. OS, but it does not have a preinstalled Google Play that is used to download and buy apps. That's why apps by iRidium and other apps are installed via APK file.
HDL S57 panels has a KIOSK-mode, that allows to limit the functions of a panel to the use of one app. It means that a user can interact with a panel only within one app and other panel functions become unavailable.
The panel is made for shockproof plastic and alluminuim alloys. A bracket for wall-mounting comes with the panel.
The panel does not support PUSH notification, thus it is not recomended for projects where push-notifications are used. In general, 1 GB RAM allows to use the panel in smaller iRidium projects.

Panel specification

Let's have a look at the the specification of HDL S57 panel as compared to iPad Air 2.

Parameter	HDL S57	iPad Air 2
Display	5.7 inches TFT matrix 1280x640 resolution 251 PPI	9.7 inches Retina matrix 2048x1536 resolution 256 PPI +Increased luminance and contrast +Improved color rendering
Connection	Wi-Fi Bluetooth Ethernet	Wi-Fi Bluetooth
Memory	1 GB RAM	2 GB RAM
Sensors	Light sensor Motion sensor gyroscope	Light sensor Gyroscope Finger scanner Barometer
Camera	No	Rear camera - 8 megapixels Front camera - 1,2 megapixels
Battery	No Power supply via Poe or 24V	About 10 hours of autonomous work Power via Lightning
Sound	Mono sound	Stereo sound
Push notifications	No	Yes
Market of apps	No	Yes (AppStore)
Size	150х81х13.5 mm.	240x169.5x6.1 mm.
Mounting	Wall-mount	Numerous way of mounting Use as a tablet
Processor	Allwinner A64 It is not recommended to use cameras with a resolution more than 720х480	Apple A8X 1.5 GHz It is not recommended to use cameras with a resolution more than 1920х1080

The results of Geekbench 4.4.0 test that measured the capacity ot the system and is a performance measure, HDL S57 panel scorred 767 points, it can be compared to Samsung Galaxy S3 Neo.

Advantages and disadvantages

As a results of the review advantages and drawbacks of HDL S57 panel can be singled out:
Advantages

• Ethernet to connect to the local network
• Proximity and light sensors
• Sensitive touch
• No battery
• Bracket for wall-mount included
• Power supply via PoE
• KIOSK-mode
  

Disadvantages:

• Low display brightness
• Color rendering and contrast are distorted when the viewing angle is changed
• Gets hot when operating for a long time
• Ambient noise during SIP-calls
• Limited performance when working with a video stream
• Low sound volume
• Push-notifications are not supported.