Using HTCC-AB01 from Heltec with Arduino_LoRa_SX12XX_Demo_Sensor sketch

[Unitech]

Hi,

Thanks for this great project. I'm looking to program an HTCC-AB01 with the Arduino_LoRa_SX12XX_Demo_Sensor sketch but I do not manage to get the NSS/NRESET/DIO1... pins configured right.

From what I see from the HTCC-AB01 Schematic Diagram, I have DIO1 on pin 25, DIO2 on pin 24 and DIO3 on pin 9, but it's not right as I get :

No device responding

Would you have any idea on how to configure the rights pin to make the sketch runs properly ?

Thank you

[CongducPham]

Well, as the SX1262 is embedded on this board, the NSS and BUSY pins are probably already wired on the SoC. From the schemaric, LoRaNSS seems to be 22/39/P4.3, SPI_RESET to be 27/P5.7 and SPI_BUSY to be 26/P4.7.

There is a file on their github that shows all the pin naming: https://github.com/HelTecAutomation/CubeCell-Arduino/blob/master/variants/CubeCell-Board/pins_arduino.h

There is probably a file in their github that defines the pins for the embedded LoRa module: https://github.com/HelTecAutomation/CubeCell-Arduino/tree/master/cores

[CongducPham]

I actually found this: https://github.com/HelTecAutomation/CubeCell-Arduino/blob/master/cores/asr650x/board/inc/board-config.h

[CongducPham]

However, the problem is that those are not standard pin numbering so there will certainly the need to embed some of their code and pin definition to make it compiling and addressing correctly the SoC pins.

https://github.com/HelTecAutomation/CubeCell-Arduino/tree/master/cores/asr650x/cores, and especially the ASR_Arduino.h file

[Unitech]

Thanks for helping.

I included the PINS definition in SX126X_RadioSettings.h:

#define MCU_PINS                                      \                                                   
  P0_0 = 0, P0_1, P0_2, P0_3, P0_4, P0_5, P0_6, P0_7, \                                                   
    P1_0 , P1_1, P1_2, P1_3, P1_4, P1_5, P1_6, P1_7,  \                                                   
    P2_0 , P2_1, P2_2, P2_3, P2_4, P2_5, P2_6, P2_7,  \                                                   
    P3_0 , P3_1, P3_2, P3_3, P3_4, P3_5, P3_6, P3_7,  \                                                   
    P4_0 , P4_1, P4_2, P4_3, P4_4, P4_5, P4_6, P4_7,  \                                                   
    P5_0 , P5_1, P5_2, P5_3, P5_4, P5_5, P5_6, P5_7,  \                                                   
    P6_0 , P6_1, P6_2, P6_3, P6_4, P6_5, P6_6, P6_7,  \                                                   
    P7_0 , P7_1, P7_2, P7_3, P7_4, P7_5, P7_6, P7_7                                                       

#define NSS P4_3                                  //select pin on LoRa device                             
#define NRESET P5_7                                //reset pin on LoRa device                             
//we do not connect RFBUSY                                                                                
//if you have a NiceRF SX1262 which has almost the same pinout than the RFM95 then                        
//you can use our ProMini LoRa PCB for RFM95 where RFBUSY (marked DIO2 on the RFM95 PCB) can be connected\
\                                                                                                         
 to D5                                                                                                    
#define RFBUSY P4_7                                //busy pin on LoRa device                              
//we do not connect DIO1 as we use polling method                                                         
//if you have a NiceRF SX1262 which has almost the same pinout than the RFM95 then                        
//you can use our ProMini LoRa PCB for RFM95 where DIO1 can be connected to D3                            
//in that case, comment #define USE_POLLING in SX126XLT.cpp to use DIO1 interrrupt pin                    
//#define DIO1 3                                  //DIO1 pin on LoRa device, used for RX and TX done      
#define DIO1 -1                                  //DIO1 pin on LoRa device, used for RX and TX done       
//*******                                                                                                 
#define DIO2 -1                                 //DIO2 pin on LoRa device, normally not used so set to -1
#define DIO3 -1                                 //DIO3 pin on LoRa device, normally not used so set to -1
#define RX_EN -1                                //pin for RX enable, used on some SX126X devices, set to \
\                                                                                                         
-1 if not used                                                                                            
#define TX_EN -1                                //pin for TX enable, used on some SX126X devices, set to \
\                                                                                                         
-1 if not used                                                                                            
#define SW -1                                   //SW pin on some Dorji LoRa devices, used to power antenn\
\                                                                                                         
a switch, set to -1 if not used                                                                           

And it seemds to work!

====================================== [SUCCESS] Took 11.44 seconds =====================================\
=                                                                                                         
--- Available filters and text transformations: colorize, debug, default, direct, hexlify, log2file, noco\
ntrol, printable, send_on_enter, time                                                                     
--- More details at http://bit.ly/pio-monitor-filters                                                     
--- Miniterm on /dev/ttyUSB0  115200,8,N,1 ---                                                            
--- Quit: Ctrl+C | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---                                     
Simple LoRa sensor demo                                                                                   
LoRa Device found                                                                                         

SX1262,865200000hz,SF12,BW125000,CR4:5,LDRO_On,SyncWord_0x1424,IQNormal,Preamble_8                        
SX1262,PacketMode_LoRa,Explicit,LNAgain_Boosted                                                           

Reg    0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F                                                     
0x0  00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00                                                      
0x10  08 00 00 00 00 00 00 5F 00 07 00 03 02 00 10 00                                                     
0x20  00 A2 1D 00 00 9A 04 27 00 00 00 00 00 00 00 00                                                     
0x30  0C C0 00 40 00 00 00 00 00 00 00 00 00 00 00 00                                                     
0x40  00 00 FF 4C 09 0C FF 00 00 00 61 BC 44 00 00 00                                                     
Setting Power: 14                                                                                         
node addr: 9                                                                                              
SX126X successfully configured                                                                            
Reading 0                                                                                                 
Sensor value is 20.50                                                                                     
Sending \!TC/20.50                                                                                        
Real payload size is 10                                                                                   
\!TC/20.50                                                                                                
--> CS1                                                                                                   
--> CAD 161                                                                                               
OK1                                                                                                       
CRC,A808                                                                                                  
LoRa pkt size 10                                                                                          
LoRa pkt seq 0                                                                                            
LoRa Sent in 1323                                                                                         

But if I want to include some of their deep sleep code, I think I will have to include their library

[CongducPham]

Ouah, great to see it is working. Actually, did you tried even without including the pin definitions? Because maybe the board definition in the Arduino IDE already does that.

For low power, it might be possible to see what lib they are using, and just use the low power function adapted for the Cortex-M0 micro-controller.

[Unitech]

Correct, by setting the proper board model in platform.ini file I manage to access to P4_3, P5_7, P4_7 pins without needing to include the PINs definition.

I create a repo with a working example + include of libraries/SX12XX and libraries/U8g2 and it works great. https://github.com/Unitech/Arduino_LoRa_SX12XX_Demo_Sensor-heltec-ab01

I will look at the deepsleep

[CongducPham]

That's great! Good to see that it is working. Thanks for digging into this board as it is quite nice!

regards,

[Unitech]

I did not managed yet to make the HTCC-AB01 sleep, but will keep you updated if I managed to. Thanks again for help

[CongducPham]

I saw the low power example. I believe that the code must be structured differently to have low power. https://github.com/HelTecAutomation/CubeCell-Arduino/tree/master/libraries/Basics/examples/LowPower