LTS5 LoRa HMI Touch Screen

LTS5 is a (% style="color:blue" %)LoRa / LoRaWAN HMI Touch Screen(%%) designed for display purpose of IoT project. It have a 5.0" HMI touch screen, and support WiFi, Bluetooch, LoRa wireless protocol.

22

23

LTS5 is an Open Source software project. The MCU is ESP32 and Dragino LA66 LoRa module. There are lots of development source for ESP32 which can greatly reduce the development time.

24

25

The HMI touch screen of LTS5 supports drap & drop design. Developer can use SquareLine to easily customize the display UI for different application.

26

27

LTS5 use LA66 LoRa module, this module can be program to support private LoRa protocol or LoRaWAN protocol.

== 1.2 Features ==

* ESP32-WROOM MCU: 8MB RAM & 16MB ROM

33

* Dragino LA66 LoRa Module

34

* Support Private LoRa protocol or LoRaWAN protocol

35

* Support WiFi & BLE wireless protocol

36

* 5.0" HMI touch screen

37

* Support LVGL case. SquareLine program.

38

* Support RS485 Interface

39

* Open Source Project

* Wall Attachable.

* 5V DC power

* IP Rating: IP52

== 1.3 Specification ==

**LoRa**:

* Frequency Range: 870 MHz ~~ 960 MHz

49

* TCXO crystal to ensure RF performance on low temperature

50

* Maximum Power +22 dBm constant RF output

51

* High sensitivity: -148 dBm

52

* LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm

53

* LoRa Rx current: <9 mA

**WiFi:**

* 802.11b/g/n

* Up to 150 Mbps data rate in 802.11n mode

59

* Support A-MPDU and A-MSDU aggregation

60

* zero point four μ S protection interval

61

* Working channel center frequency range: 2412~~2484 MHz

**Bluetooth:**

* Bluetooth V4.2 BR/EDR and Bluetooth LE standard

66

* Class-1, Class-2, and Class-3 transmitters.

* AFH

* CVSD and SBC

**Display:**

* 5.0 Inch , 800 x 480

73

* IPS Capacitive Touch SCreen

74

* RGB color.

75

* Display Area: 120.7*75.80 mm

76

77

== 1.4 Power Consumption ==

78

79

* External 5V DC power adapter

80

81

== 1.5 Storage & Operation Temperature ==

82

83

* Operation Temperature: -20 ~~ 70°C (No Dew)

84

* Storage Temperature: -30 ~~ 70°C (No Dew)

85

86

== 1.6 Applications ==

87

88

* Smart Buildings & Home Automation

89

* Logistics and Supply Chain Management

* Smart Metering

* Smart Agriculture

* Smart Cities

* Smart Factory

= 2. Getting Started with Hello World =

96

97

== 2.1 About this demo ==

98

99

In this Getting Started Example, we will show how to design a simple Display UI and upload it to LTS5. This UI has a button , when user click the button. The Web UI will jump to a new page.

100

101

== 2.2 Install Software Running Environment ==

102

103

The ESP MCU can be developed using ESP-IDF, Arduino, or MicroPython. For this project, we utilize ESP-IDF for compilation and Visual Studio Code (VSCode) for editing.

104

105

=== 2.2.1 Install VSCode and ESP-IDF extension ===

106

107

Firstly, download and install VSCode for your computer's operating system from the official website: [[Download Visual Studio Code - Mac, Linux, Windows>>url:https://code.visualstudio.com/download]].

108

109

Next, you need to install the ESP-IDF extension within VSCode. The detailed operation steps are illustrated in image 1.

110

111

[[image:image-20240928110211-5.png||height="508" width="866"]]

112

113

image 1 ESP-IDF extension install

114

115

Links for reference: [[Install ESP32 ESP-IDF on Windows and Integrate with VS code (esp32tutorials.com)>>url:https://esp32tutorials.com/install-esp32-esp-idf-windows-integrate-vs-code/#:~~:text=In%20this%20tutorial,%20we%20will%20show%20you%20how%20to%20install]]

116

117

=== 2.2.2 Install SquareLine Studio ===

118

119

The version we are utilizing for this software is 1.4.2. You can download it from the official link: [[SquareLine Studio - Download the current version of SquareLine Studio>>url:https://squareline.io/downloads#lastRelease]].

120

121

Please note that this software necessitates the registration of a license prior to usage, and various licenses come with distinct limitations. For instance, the free version imposes restrictions such as a limit of 1 component, 150 widgets, and 10 screens. However, for first-time downloads, you are granted unrestricted access for a period of 30 days without the need for immediate registration.

122

123

== 2.3 Simple usage of SquareLine Studio and export UI code ==

124

125

After launching and logging in to this software, create a project as shown in the following image 2. The version of LVGL is 8.3.11.

126

127

128

[[image:image-20240928103357-2.png||height="680" width="708"]]

129

130

image 2 create a SquareLine project

131

132

Next, we need to make some settings for this project. By clicking in the specified order on image 3, we can see the page as shown in image 4.

133

134

[[image:1727229582471-566.png]]

135

136

image 3 project settings

137

138

[[image:image-20240928105309-4.png||height="526" width="556"]]

139

140

image 4 modify project settings

141

142

Now we can start to use this software. Here are some usage information for this software.

**1.add widget**

To add a widget, you should click a widget you want to add at the area entitled “Widgets”. In image , demonstrate a add process of label, button, and image 5.

147

148

[[image:image-20240928111412-6.png||height="526" width="864"]]

image 5 add widgets

**2.modify widget**

The area for modifying widgets is called "Inspector". There are four parts in the "Inspector" tab. We use three of them more frequently, excluding "COMPONENT". The second part is aimed at adjusting the layout, size, position, alignment, flags, and states, etc. of widgets. The name of the second part indicates the type of widget it is representing, and in image 6, it is "BUTTON".

155

156

[[image:1727485118799-984.png]]

157

158

image 6 the button widget's "Inspector" tab

159

160

Second part: "Layout" means a auto position-management for widgets contained in the parent widget. "Transform" includes size, position and align modification.

161

162

[[image:1727485251053-655.png]]

163

164

image 7 the button widget's "BUTTON" tab

165

166

Third part: It is an area of style setting.

167

168

Fourth part: It is an area for adding events. In image 8, it is adding a click event to a button. If the button is clicked after the click event is added as shown in image 8, the current screen will fade into another specified screen, and the switching process will last 500ms.

169

170

[[image:1727485480434-713.png||height="395" width="290"]]

171

172

image 8 add event for button

173

174

**3.change label widget content**

175

176

Modify the content in text as shown in image 9, the text content of label widget will be changed accordingly.

177

178

[[image:image-20240928090825-1.png||height="327" width="391"]]

179

180

image 9 modify text content of label widget

181

182

**4.Add image into project**

183

184

To use the image widget, you should first add an image to your project. The image format must be PNG, and its resolution should not exceed 800x480 pixels. There are two ways to add an image file. One way is to move your image into the folder "…/squareline project/assets/", as shown in image 10. The other way is to click the "ADD FILE INTO ASSETS" button, then select an image from your computer to import. After adding, you can see the image in the "assets" area in SquareLine Studio, as demonstrated in image 11.

185

186

[[image:image-20240928113424-9.png||height="355" width="505"]]

187

188

image 10 add image file into SquareLine Studio project

189

190

[[image:image-20240928114139-10.png||height="559" width="810"]]

191

192

image 11 use image widget in SquareLine Studio

193

194

**5.The relationship between widgets**

195

196

There are two common relationships between widgets: one is parallel, the other is parent-child. The parallel relationship means that widgets' relative position is based on a collective object of reference. In parent-child relationship, the parts of the child object that are outside the boundaries of the parent object are not visible by default. Therefore, we need to adjust the position of the child object so that it falls within the range of the parent object, allowing it to be seen as illustrated in image 13.

197

198

[[image:1727486567182-334.png||height="318" width="278"]]

199

200

image 12 move label1 to make label1 widget be a child of button1 widget(1)

201

202

[[image:image-20240928112001-8.png||height="431" width="796"]]

203

204

image 13 move label1 to make label1 widget be a child of button1 widget(2)

205

206

**6.Preview the final effect**

207

208

An advantage of this kind of software is that you can edit the UI with quick previews. In other words, it provides a way of combining graphical programming with simulation immediately.

209

210

[[image:1727487368023-281.png]]

211

212

image 14 click on the triangle icon to start or end the simulation

213

214

For more detailed usage, please visit the official link: [[SquareLine Studio 1.4.2 Documentation ~| SquareLine Studio>>url:https://docs.squareline.io/docs/squareline/]].

215

216

217

== 2.4 Integrate UI Code to ESP-IDF Project ==

218

219

To achieve the integrating, we first need to export the UI code, then make some modifications, and finally relocate the UI code to a specific position within the project.

220

221

[[image:1727229798126-306.png]]

222

223

image 15 export UI file

224

225

[[image:1727229821582-258.png||height="333" width="662"]]

226

227

image 16 exported UI file

228

229

Create a empty directory entitled "ui" in path "basic_prj/app_components/ui/", and then copy all UI code exported to this directory.

230

231

[[image:image-20240928144830-11.png]]

232

233

image 17 open CMakeLists.txt

234

235

[[image:1727229892636-154.png||height="521" width="407"]]

236

237

image 18 modify CMakeLists.txt

238

239

The last step of integrating is adding two lines of code in main.c file.

240

241

[[image:1727229926561-300.png]]

image 19 add "ui.h"

[[image:1727229955611-607.png]]

246

247

image 20 add "ui_init()"

248

249

== 2.5 Brief introduction of hello world project ==

250

251

The project consists of two screens. The first screen displays the company's logo, the project name, and a button to navigate to the next screen. The second screen presents some information about this HMI screen product through an image and includes a button to return to the previous screen.

252

253

== 2.6 Test Result ==

254

255

By pressing the button lying bottom right, the screen can switch to another as expected. This indicates that the UI file has been successfully integrated into the project and is now effective.

256

257

[[image:1727488067077-684.png||height="402" width="574"]]

image 21 screen1

[[image:1727488157579-949.png||height="397" width="572"]]

image 22 screen2

= 3. Example Project 1: LoRa Central Display =

266

267

[[image:image-20240916101737-1.png||height="468" width="683"]]

= 4. Example Project 2: LoRaWAN RS485 Alarm =

= 6. FAQ =

== 6.1 ==

= 7. Order Info =

== 7.1 Part Number ==

282

283

Part Number: (% style="color:#4472c4" %)LTS5

284

285

286

== 7.2 Packing Info ==

287

288

**Package Includes**:

289

290

* LTS5 HMI Touch Screen

291

* 5V,2A DC Power Adapter.

292

* USB Type C Program Cable

= 8. Support =

* Support is provided Monday to Friday, from 09:00 to 18:00 GMT+8. Due to different timezones we cannot offer live support. However, your questions will be answered as soon as possible in the before-mentioned schedule.

297

* Provide as much information as possible regarding your enquiry (product models, accurately describe your problem and steps to replicate it etc) and send a mail to [[support@dragino.com>>url:file:///D:/市场资料/说明书/LoRa/LT系列/support@dragino.com]].

298

299

= 9. Reference material =

* Datasheet

* Source Code

* Mechinical