Skip to Content

Wiki source code of LA66 LoRaWAN Module

Version 71.1 by Edwin Chen on 2022/07/03 00:00
Show last authors
1 {{box cssClass="floatinginfobox" title="**Contents**"}}
2 {{toc/}}
3 {{/box}}
4
5 = LA66 LoRaWAN Module =
6
7 == What is LA66 LoRaWAN Module ==
8
9 (% style="color:blue" %)**Dragino LA66**(%%) is a small wireless LoRaWAN module that offers a very compelling mix of long-range, low power consumption, and secure data transmission. It is designed to facilitate developers to quickly deploy industrial-level LoRaWAN and IoT solutions. It helps users to turn the idea into a practical application and make the Internet of Things a reality. It is easy to create and connect your things everywhere.
10
11 (% style="color:blue" %)**LA66**(%%) is a ready-to-use module that includes the (% style="color:blue" %)**LoRaWAN v1.0.4 protocol**(%%). The LoRaWAN stack used in LA66 is used in more than 1 million LoRaWAN End Devices deployed world widely. This mature LoRaWAN stack greatly reduces the risk to make stable LoRaWAN Sensors to support different LoRaWAN servers and different countries' standards. External MCU can use AT command to call LA66 and start to transmit data via the LoRaWAN protocol.
12
13 Each LA66 module includes a (% style="color:blue" %)**world-unique OTAA key**(%%) for LoRaWAN registration.
14
15 Besides the support of the LoRaWAN protocol, LA66 also supports (% style="color:blue" %)**open-source peer-to-peer LoRa Protocol**(%%) for the none-LoRaWAN application.
16
17 LA66 is equipped with (% style="color:blue" %)**TCXO crystal**(%%) which ensures the module can achieve stable performance in extreme temperatures.
18
19
20 == Features ==
21
22 * Support LoRaWAN v1.0.4 protocol
23 * Support peer-to-peer protocol
24 * TCXO crystal to ensure RF performance on low temperature
25 * SMD Antenna pad and i-pex antenna connector
26 * Available in different frequency LoRaWAN frequency bands.
27 * World-wide unique OTAA keys.
28 * AT Command via UART-TTL interface
29 * Firmware upgradable via UART interface
30 * Ultra-long RF range
31
32
33 == Specification ==
34
35 * CPU: 32-bit 48 MHz
36 * Flash: 256KB
37 * RAM: 64KB
38 * Input Power Range: 1.8v ~~ 3.7v
39 * Power Consumption: < 4uA.
40 * Frequency Range: 150 MHz ~~ 960 MHz
41 * Maximum Power +22 dBm constant RF output
42 * High sensitivity: -148 dBm
43 * Temperature:
44 ** Storage: -55 ~~ +125℃
45 ** Operating: -40 ~~ +85℃
46 * Humidity:
47 ** Storage: 5 ~~ 95% (Non-Condensing)
48 ** Operating: 10 ~~ 95% (Non-Condensing)
49 * LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
50 * LoRa Rx current: <9 mA
51 * I/O Voltage: 3.3v
52
53 == AT Command ==
54
55 AT Command is valid over Main TXD and Main RXD. Serial Baud Rate is 9600. AT commands can be found in AT Command documents.
56
57
58 == Dimension ==
59
60 [[image:image-20220517072526-1.png]]
61
62
63 == Pin Mapping ==
64
65 [[image:image-20220523101537-1.png]]
66
67 == Land Pattern ==
68
69 [[image:image-20220517072821-2.png]]
70
71
72 == Part Number ==
73
74 Part Number: **LA66-XXX**
75
76 **XX**: The default frequency band
77
78 * **AS923**: LoRaWAN AS923 band
79 * **AU915**: LoRaWAN AU915 band
80 * **EU433**: LoRaWAN EU433 band
81 * **EU868**: LoRaWAN EU868 band
82 * **KR920**: LoRaWAN KR920 band
83 * **US915**: LoRaWAN US915 band
84 * **IN865**: LoRaWAN IN865 band
85 * **CN470**: LoRaWAN CN470 band
86 * **PP**: Peer to Peer LoRa Protocol
87
88
89
90 = LA66 LoRaWAN Shield =
91
92 == Overview ==
93
94 LA66 LoRaWAN Shield is the Arduino shield base on LA66. Users can use LA66 LoRaWAN Shield to rapidly add LoRaWAN or peer-to-peer LoRa wireless function to  Arduino projects.
95
96
97 == Features ==
98
99 * Arduino Shield base on LA66 LoRaWAN module
100 * Support LoRaWAN v1.0.4 protocol
101 * Support peer-to-peer protocol
102 * TCXO crystal to ensure RF performance on low temperature
103 * SMA connector
104 * Available in different frequency LoRaWAN frequency bands.
105 * World-wide unique OTAA keys.
106 * AT Command via UART-TTL interface
107 * Firmware upgradable via UART interface
108 * Ultra-long RF range
109
110
111 == Specification ==
112
113 * CPU: 32-bit 48 MHz
114 * Flash: 256KB
115 * RAM: 64KB
116 * Input Power Range: 1.8v ~~ 3.7v
117 * Power Consumption: < 4uA.
118 * Frequency Range: 150 MHz ~~ 960 MHz
119 * Maximum Power +22 dBm constant RF output
120 * High sensitivity: -148 dBm
121 * Temperature:
122 ** Storage: -55 ~~ +125℃
123 ** Operating: -40 ~~ +85℃
124 * Humidity:
125 ** Storage: 5 ~~ 95% (Non-Condensing)
126 ** Operating: 10 ~~ 95% (Non-Condensing)
127 * LoRa Tx Current: <90 mA at +17 dBm, 108 mA at +22 dBm
128 * LoRa Rx current: <9 mA
129 * I/O Voltage: 3.3v
130
131
132 == Pin Mapping & LED ==
133
134 == Example: Use AT Command to communicate with LA66 module via Arduino UNO. ==
135
136 == Example: Join TTN network and send an uplink message, get downlink message. ==
137
138 == Example: Log Temperature Sensor(DHT11) and send data to TTN, show it in DataCake. ==
139
140 == Upgrade Firmware of LA66 LoRaWAN Shield ==
141
142 === what needs to be used ===
143
144 1.LA66 LoRaWAN Shield that needs to be upgraded
145
146 2.Arduino
147
148 3.USB TO TTL
149
150 [[image:image-20220602100052-2.png]]
151
152 === Wiring Schematic ===
153
154 [[image:image-20220602101311-3.png]]
155
156 LA66 LoRaWAN Shield  >>>>>>>>>>>>USB TTL
157
158 GND  >>>>>>>>>>>>GND
159
160 TXD  >>>>>>>>>>>>TXD
161
162 RXD  >>>>>>>>>>>>RXD
163
164 JP6 of LA66 LoRaWAN Shield needs to be connected with yellow jumper cap
165
166 Connect to the PC after connecting the wires
167
168 [[image:image-20220602102240-4.png]]
169
170 === Upgrade steps ===
171
172 ==== Dial the SW1 of the LA66 LoRaWAN Shield to the ISP's location as shown in the figure below ====
173
174 [[image:image-20220602102824-5.png]]
175
176 ==== Press the RST switch on the LA66 LoRaWAN Shield once ====
177
178 [[image:image-20220602104701-12.png]]
179
180 ==== Open the upgrade application software ====
181
182 Software download link:  [[https:~~/~~/www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/>>https://www.dragino.com/downloads/index.php?dir=LSN50-LoRaST/Utility/LSN50N/]]
183
184 [[image:image-20220602103227-6.png]]
185
186 [[image:image-20220602103357-7.png]]
187
188 ===== Select the COM port corresponding to USB TTL =====
189
190 [[image:image-20220602103844-8.png]]
191
192 ===== Select the bin file to burn =====
193
194 [[image:image-20220602104144-9.png]]
195
196 [[image:image-20220602104251-10.png]]
197
198 [[image:image-20220602104402-11.png]]
199
200 ===== Click to start the download =====
201
202 [[image:image-20220602104923-13.png]]
203
204 ===== The following figure appears to prove that the burning is in progress =====
205
206 [[image:image-20220602104948-14.png]]
207
208 ===== The following picture appears to prove that the burning is successful =====
209
210 [[image:image-20220602105251-15.png]]
211
212 = LA66 USB LoRaWAN Adapter =
213
214 LA66 USB LoRaWAN Adapter is the USB Adapter for LA66, it combines a USB TTL Chip and LA66 module which can easy to test the LoRaWAN feature by using PC or embedded device which has USB Interface.
215
216 Before use, please make sure that the computer has installed the CP2102 driver
217
218 == Pin Mapping & LED ==
219
220 == Example Send & Get Messages via LoRaWAN in PC ==
221
222 Connect the LA66 LoRa Shield to the PC
223
224 [[image:image-20220602171217-1.png||height="615" width="915"]]
225
226 Open the serial port tool
227
228 [[image:image-20220602161617-8.png]]
229
230 [[image:image-20220602161718-9.png||height="529" width="927"]]
231
232 Press the reset switch RST on the LA66 LoRa Shield.
233
234 The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
235
236 [[image:image-20220602161935-10.png]]
237
238 send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
239
240 example: AT+SENDB=01,02,8,05820802581ea0a5
241
242 [[image:image-20220602162157-11.png]]
243
244 Check to see if TTN received the message
245
246 [[image:image-20220602162331-12.png||height="547" width="1044"]]
247
248 == Example Send & Get Messages via LoRaWAN in RPi ==
249
250 Connect the LA66 LoRa Shield to the RPI
251
252 [[image:image-20220602171233-2.png||height="592" width="881"]]
253
254 Log in to the RPI's terminal and connect to the serial port
255
256 [[image:image-20220602153146-3.png]]
257
258 Press the reset switch RST on the LA66 LoRa Shield.
259 The following picture appears to prove that the LA66 LoRa Shield successfully entered the network
260
261 [[image:image-20220602154928-5.png]]
262
263 send instructions: AT+SENDB=<confirn_status>,<Fport>,<data_len>,<data>
264
265 example: AT+SENDB=01,02,8,05820802581ea0a5
266
267 [[image:image-20220602160339-6.png]]
268
269 Check to see if TTN received the message
270
271 [[image:image-20220602160627-7.png||height="468" width="1013"]]
272
273 === Install Minicom ===
274
275 Enter the following command in the RPI terminal
276
277 apt update
278
279 [[image:image-20220602143155-1.png]]
280
281 apt install minicom
282
283 [[image:image-20220602143744-2.png]]
284
285 === Send PC's CPU/RAM usage to TTN via script. ===
286
287 ==== Take python as an example： ====
288
289 ===== Preconditions: =====
290
291 1.LA66 USB LoRaWAN Adapter works fine
292
293 2.LA66 USB LoRaWAN Adapter  is registered with TTN
294
295 ===== Steps for usage =====
296
297 1.Press the reset switch RESET on the LA66 USB LoRaWAN Adapter
298
299 2.Run the script and see the TTN
300
301 [[image:image-20220602115852-3.png]]
302
303
304
305 == Example: LA66 USB Module got a message from LA66 LoRa Shield and send the sensor data to NodeRed. ==
306
307
308 == Upgrade Firmware of LA66 USB LoRaWAN Adapter ==
309
310