Changes for page SPH01-LB -- LoRaWAN Soil pH Sensor User Manual
Last modified by Xiaoling on 2024/01/15 09:36
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... ... @@ -556,13 +556,23 @@ 556 556 557 557 == 2.7 Calibration == 558 558 559 +Step1 : Clean probe 559 559 561 +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 + 560 560 ((( 561 561 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 562 562 ))) 563 563 564 564 ((( 565 - Afterstable, user can use below command to calibrate.575 + User can use below command to calibrate. 566 566 567 567 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:520px" %) 568 568 |(% 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** ... ... @@ -590,7 +590,20 @@ 590 590 ))) 591 591 ))) 592 592 603 +To use the AT COMMAND, refer to this link: 593 593 605 +* 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 + 594 594 (% style="color:#037691" %)**Calibration Payload** 595 595 596 596 (% border="1" cellspacing="5" style="background-color:#f2f2f2; width:500px" %) ... ... @@ -616,6 +616,15 @@ 616 616 617 617 * Reply to non-confirmed packet: 14 00 618 618 642 +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 + 619 619 == 2.8 Frequency Plans == 620 620 621 621 ... ... @@ -803,10 +803,13 @@ 803 803 804 804 (% style="color:#037691" %)**Sub-Band**(%%): 805 805 806 -* AU915 and US915: value 0x00 ~~ 0x08 807 -* CN470: value 0x0B ~~ 0x0C 808 -* Other Bands: Always 0x00 838 +AU915 and US915: value 0x00 ~~ 0x08 809 809 840 +CN470: value 0x0B ~~ 0x0C 841 + 842 +Other Bands: Always 0x00 843 + 844 + 810 810 (% style="color:#037691" %)**Battery Info**: 811 811 812 812 Check the battery voltage.