Changes for page SPH01-LB -- LoRaWAN Soil pH Sensor User Manual
Last modified by Xiaoling on 2024/01/15 09:36
Change comment:
There is no comment for this version
Summary
-
Page properties (2 modified, 0 added, 0 removed)
Details
- Page properties
-
- Author
-
... ... @@ -1,1 +1,1 @@ 1 -XWiki. Xiaoling1 +XWiki.Bei - Content
-
... ... @@ -54,8 +54,6 @@ 54 54 * Downlink to change configure 55 55 * 8500mAh Battery for long term use 56 56 57 - 58 - 59 59 == 1.3 Specification == 60 60 61 61 ... ... @@ -101,8 +101,6 @@ 101 101 * Sleep Mode: 5uA @ 3.3v 102 102 * LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm 103 103 104 - 105 - 106 106 == 1.4 Applications == 107 107 108 108 ... ... @@ -560,13 +560,23 @@ 560 560 561 561 == 2.7 Calibration == 562 562 559 +Step1 : Clean probe 563 563 561 +user can use high grade sandpaper to polish it or put in 5% hydrochloric acid for several minutes. After the metal probe looks new, users can clean it to remove hydrochloric acid or other liquids from the surface. 562 + 563 +Step2 : Immerse the sensor in ph buffer solution to make the sensor values stable 564 + 564 564 ((( 565 565 User can do calibration for the probe. It is limited to use below pH buffer solution to calibrate: 4.00, 6.86, 9.18. When calibration, user need to clean the electrode and put the probe in the pH buffer solution to wait the value stable ( a new clean electrode might need max 24 hours to be stable). 567 + 568 +Note:Only one ph buffer with one of the ph values needs to be calibrated during calibration. Wait for the sensor measurement value to be stable, it does not need to be the same as the ph marked by the ph buffer 569 + 570 + 571 +Step3 : The numerically stable sensors were calibrated using commands 566 566 ))) 567 567 568 568 ((( 569 - Afterstable, user can use below command to calibrate.575 + User can use below command to calibrate. 570 570 571 571 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:520px" %) 572 572 |(% style="background-color:#d9e2f3; color:#0070c0; width:120px" %)**pH buffer solution**|(% style="background-color:#d9e2f3; color:#0070c0; width:150px" %)**AT Command to calibrate**|(% style="background-color:#d9e2f3; color:#0070c0; width:150px" %)**Downlink Command**|(% style="background-color:#d9e2f3; color:#0070c0; width:100px" %)**Read Cal Value** ... ... @@ -594,7 +594,20 @@ 594 594 ))) 595 595 ))) 596 596 603 +To use the AT COMMAND, refer to this link: 597 597 605 +* AT Command via Bluetooth Connection (**Recommended**): [[BLE Configure Instruction>>url:http://wiki.dragino.com/xwiki/bin/view/Main/BLE%20Bluetooth%20Remote%20Configure/]]. 606 + 607 +* AT Command via UART Connection : See [[UART Connection>>url:http://wiki.dragino.com/xwiki/bin/view/Main/UART%20Access%20for%20LoRa%20ST%20v4%20base%20model/#H2.3UARTConnectionforSN50v3basemotherboard]]. 608 + 609 +To use Downlink, take TTN as an example, please refer to this link: 610 + 611 +* LoRaWAN Downlink. Instruction for different platforms: See [[IoT LoRaWAN Server>>url:http://wiki.dragino.com/xwiki/bin/view/Main/]] section. 612 + 613 + 614 +When the command is successfully used, the node sends a uplink. 615 +This is the payload for uplink 616 + 598 598 (% style="color:#037691" %)**Calibration Payload** 599 599 600 600 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %) ... ... @@ -620,6 +620,15 @@ 620 620 621 621 * Reply to non-confirmed packet: 14 00 622 622 642 +Step4: 643 + 644 +After the calibration is completed, its measurement results in this ph buffer solution should be consistent with the numerical value of the command used in the calibration 645 + 646 +Examples: 647 +After using the command AT+PH=9 in 9.18ph buffer 648 +The readout returned by the sensor in 9.18ph buffer should be pH=9 649 + 650 + 623 623 == 2.8 Frequency Plans == 624 624 625 625