Changes for page RS485-LN – RS485 to LoRaWAN Converter User Manual
Last modified by Bei Jinggeng on 2025/01/16 11:36
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... ... @@ -64,7 +64,7 @@ 64 64 65 65 (% style="color:#037691" %)**Hardware System:** 66 66 67 -* STM32L072 CZT6MCU67 +* STM32L072xxxx MCU 68 68 * SX1276/78 Wireless Chip 69 69 * Power Consumption (exclude RS485 device): 70 70 ** Idle: 32mA@12v ... ... @@ -1195,21 +1195,22 @@ 1195 1195 1196 1196 ==== (% style="color:blue" %)**Configure Databit (Since Version 1.4.0)**(%%) ==== 1197 1197 1198 + 1198 1198 * ((( 1199 1199 (% style="color:#037691" %)** AT Command:** 1200 1200 ))) 1201 1201 1202 -** ~AT+DATABIT=7 **~/~/ Set the data bits to 71203 +(% style="color:#4472c4" %)** AT+DATABIT=7 **(%%)~/~/ Set the data bits to 7 1203 1203 1204 -** ~AT+DATABIT=8 **~/~/ Set the data bits to 81205 +(% style="color:#4472c4" %)** AT+DATABIT=8 **(%%)~/~/ Set the data bits to 8 1205 1205 1206 1206 * ((( 1207 1207 (% style="color:#037691" %)**Downlink Payload:** 1208 1208 ))) 1209 1209 1210 -** ~A7 04 07**: Same as AT+DATABIT=71211 +(% style="color:#4472c4" %)** A7 04 07**(%%): Same as AT+DATABIT=7 1211 1211 1212 -** ~A7 04 08**: Same as AT+DATABIT=81213 +(% style="color:#4472c4" %)** A7 04 08**(%%): Same as AT+DATABIT=8 1213 1213 1214 1214 1215 1215 ... ... @@ -1681,7 +1681,106 @@ 1681 1681 [[Use RS485-BL or RS485-LN to connect to RS232 devices. - DRAGINO>>url:http://8.211.40.43:8080/xwiki/bin/view/Main/RS485%20to%20RS232/]] 1682 1682 1683 1683 1685 +== 6.7 How to judge whether there is a problem with the set COMMAND == 1684 1684 1687 += Introduce: = 1688 + 1689 + 1690 +Users can use below the structure to fast debug the communication between RS485BL and RS485-LN. The principle is to put the PC in the RS485 network and sniff the packet between Modbus MTU and RS485-BL/LN. We can use this way to: 1691 + 1692 +1. Test if Modbus-MTU works with PC commands. 1693 +1. Check if RS485-LN sent the expected command to Mobus-MTU 1694 +1. Check if Modbus-MTU return back the expected result to RS485-LN. 1695 +1. If both b) and c) has issue, we can compare PC’s output and RS485-LN output. 1696 + 1697 +[[image:image-20221130104310-1.png||height="380" width="680"]] 1698 + 1699 + 1700 +Example Connection: 1701 + 1702 +[[image:image-20221130104310-2.png]] 1703 + 1704 + 1705 += Set up PC to monitor RS485 network = 1706 + 1707 +== With Serial tool == 1708 + 1709 +Note: Receive and send set to hex mode 1710 + 1711 +[[image:image-20221130104310-3.png||height="616" width="714"]] 1712 + 1713 + 1714 +== With ModRSsim2: == 1715 + 1716 +(1)Select serial port MODBUS RS-232 1717 + 1718 +[[image:image-20221130104310-4.png||height="390" width="865"]] 1719 + 1720 + 1721 +(2)Click the serial port icon 1722 + 1723 +[[image:image-20221130104310-5.png||height="392" width="870"]] 1724 + 1725 + 1726 +(3)After selecting the correct serial port and baud rate, click ok 1727 + 1728 +[[image:image-20221130104310-6.png]] 1729 + 1730 +(4)Click the comms. 1731 + 1732 +[[image:image-20221130104310-7.png||height="376" width="835"]] 1733 + 1734 += Run RS485-LN/BL command and monitor if it is correct. = 1735 + 1736 +== Example – Test the CFGDEV command == 1737 + 1738 +RS485-LN sent below command: 1739 + 1740 +AT+CFGDEV=01 03 20 00 01 85 c0,1 to RS485 network, and PC is able to get this command and return commands from MTU to show in the serial tool. 1741 + 1742 + 1743 +We can see the output from the Serial port tool to analyze. And check if they are expected result. 1744 + 1745 +[[image:image-20221130104310-8.png||height="214" width="797"]] 1746 + 1747 +We can also use ModRSsim2 to see the output. 1748 + 1749 +[[image:image-20221130104310-9.png||height="531" width="729"]] 1750 + 1751 + 1752 + 1753 +== Example – Test CMD command sets. == 1754 + 1755 +Run AT+SENSORVALUE=1 to test the CMD commands set in RS485-LN. 1756 + 1757 + 1758 +Serial port tool: 1759 + 1760 +[[image:image-20221130104310-10.png||height="339" width="844"]] 1761 + 1762 +ModRSsim2: 1763 + 1764 +[[image:image-20221130104310-11.png||height="281" width="962"]] 1765 + 1766 + 1767 + 1768 += **Test with PC** = 1769 + 1770 +If there is still have problem to set up correctly the commands between RS485-LN and MTU. User can test the correct RS485 command set in PC and compare with the RS485 command sent out via RS485-LN. as long as both commands are the same, the MTU should return correct result. 1771 + 1772 + 1773 +Or User can send the working commands set in PC serial tool to Dragino Support to check what should be configured in RS485-LN. 1774 + 1775 +Connection method： 1776 + 1777 +[[image:image-20221130104310-12.png]] 1778 + 1779 +Link situation: 1780 + 1781 +[[image:image-20221130104310-13.png||height="458" width="486"]] 1782 + 1783 +[[image:image-20221130104310-14.png||height="371" width="823"]] 1784 + 1685 1685 = 7. Trouble Shooting = 1686 1686 1687 1687
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