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.

28

29

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.

30

31

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

32

33

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

39

* Dragino LA66 LoRa Module

40

* Support Private LoRa protocol or LoRaWAN protocol

41

* Support WiFi & BLE wireless protocol

42

* 5.0" HMI touch screen

43

* Support LVGL case. SquareLine program.

44

* Support RS485 Interface

45

* Open Source Project

* Wall Attachable.

* 5V DC power

* IP Rating: IP52

== 1.3 Specification ==

**LoRa**:

* Frequency Range: 870 MHz ~~ 960 MHz

57

* TCXO crystal to ensure RF performance on low temperature

58

* Maximum Power +22 dBm constant RF output

59

* High sensitivity: -148 dBm

60

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

61

* LoRa Rx current: <9 mA

**WiFi:**

* 802.11b/g/n

* Up to 150 Mbps data rate in 802.11n mode

67

* Support A-MPDU and A-MSDU aggregation

68

* zero point four μ S protection interval

69

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

**Bluetooth:**

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

74

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

* AFH

* CVSD and SBC

**Display:**

* 5.0 Inch , 800 x 480

81

* IPS Capacitive Touch SCreen

82

* RGB color.

83

* Display Area: 120.7*75.80 mm

84

85

== 1.4 Power Consumption ==

86

87

88

* External 5V DC power adapter

89

90

91

== 1.5 Storage & Operation Temperature ==

92

93

94

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

95

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

96

97

98

== 1.6 Applications ==

99

100

101

* Smart Buildings & Home Automation

102

* Logistics and Supply Chain Management

* Smart Metering

* Smart Agriculture

* Smart Cities

* Smart Factory

= 2. Getting Started with Hello World =

110

111

== 2.1 About this demo ==

112

113

114

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.

115

116

117

== 2.2 Install Software Running Environment ==

118

119

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.

120

121

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

122

123

124

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]].

125

126

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

127

128

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

129

130

image 1 ESP-IDF extension install

131

132

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]]

133

134

135

=== 2.2.2 Install SquareLine Studio ===

136

137

138

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]].

139

140

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.

141

142

143

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

144

145

146

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.

147

148

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

149

150

image 2 create a SquareLine project

151

152

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.

153

154

[[image:1727229582471-566.png]]

155

156

image 3 project settings

157

158

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

159

160

image 4 modify project settings

161

162

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.

167

168

[[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".

175

176

[[image:1727485118799-984.png]]

177

178

image 6 the button widget's "Inspector" tab

179

180

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

181

182

[[image:1727485251053-655.png]]

183

184

image 7 the button widget's "BUTTON" tab

185

186

Third part: It is an area of style setting.

187

188

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.

189

190

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

191

192

image 8 add event for button

193

194

**3. change label widget content**

195

196

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

197

198

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

199

200

image 9 modify text content of label widget

201

202

**4. Add image into project**

203

204

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.

205

206

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

207

208

image 10 add image file into SquareLine Studio project

209

210

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

211

212

image 11 use image widget in SquareLine Studio

213

214

**5. The relationship between widgets**

215

216

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.

217

218

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

219

220

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

221

222

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

223

224

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

225

226

**6. Preview the final effect**

227

228

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.

229

230

[[image:1727487368023-281.png]]

231

232

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

233

234

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

235

236

237

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

238

239

240

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.

241

242

[[image:1727229798126-306.png]]

243

244

image 15 export UI file

245

246

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

247

248

image 16 exported UI file

249

250

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

251

252

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

253

254

image 17 open CMakeLists.txt

255

256

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

257

258

image 18 modify CMakeLists.txt

259

260

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

261

262

[[image:1727229926561-300.png]]

image 19 add "ui.h"

[[image:1727229955611-607.png]]

267

268

image 20 add "ui_init()"

269

270

271

== 2.5 Brief introduction of hello world project ==

272

273

274

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.

275

276

277

== 2.6 Test Result ==

278

279

280

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.

281

282

[[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 =

292

293

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

294

295

296

= 4. Example Project 2: LoRaWAN RS485 Alarm =

= 6. FAQ =

== 6.1 ==

= 7. Order Info =

== 7.1 Part Number ==

307

308

309

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

310

311

312

== 7.2 Packing Info ==

313

314

315

**Package Includes**:

316

317

* LTS5 HMI Touch Screen

318

* 5V,2A DC Power Adapter.

319

* 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.

326

* 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]].

327

328

329

= 9. Reference material =

* Datasheet

* Source Code

* Mechinical