Custom GATT with esp32-at
Posted: Wed Feb 28, 2018 12:36 pm
I have designed a custom GATT service for the AT Command image (esp32-at) and am trying to follow instructions, but it does not appear to be working. Here is an example of my service below in GattServiceExample.csv
I have generated an image with the following command:
I have flashed it to the appropriate memory address:
However, it seems that this isn't working. When using the default Gatt image, I can see the device using a gatt tool. I also see relevant data in the uart output
But with my customized gatt service, I cannot, and uart looks like it's not correct:
Any thoughts or suggestions on how to get it running?
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index uuid_len uuid perm val_max_len val_cur_len value
0 128 0x526B87BE39CE491BA8715B9A209EEDC8 0x01 2 2 ADD0
1 128 0x526b87bf39ce491ba8715b9a209eedc8 0x12 2 2 0
2 128 0x526b87c039ce491ba8715b9a209eedc8 0x12 2 2 0
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$ python BLEService.py -t GattServiceExample.bin GattServiceExample.csv
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$ ../../esptool/esptool.py --port COM6 write_flash 0x21000 GattServiceExample.bin
esptool.py v2.3
Connecting....
Detecting chip type... ESP32
Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core
Uploading stub...
Running stub...
Stub running...
Configuring flash size...
Auto-detected Flash size: 4MB
Compressed 1676 bytes to 248...
Wrote 1676 bytes (248 compressed) at 0x00021000 in 0.0 seconds (effective 437.0 kbit/s)...
Hash of data verified.
Leaving...
Hard resetting via RTS pin...
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at
at
OK
AT+BLEINIT?
AT+BLEINIT?
+BLEINIT:0
OK
AT+BLEINIT=2
AT+BLEINIT=2
OK
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVCRE
OK
AT+BLEGATTSSRV?
AT+BLEGATTSSRV?
+BLEGATTSSRV:1,0,0xA002,1
OK
AT+BLEGATTSSRVSTART
AT+BLEGATTSSRVSTART
OK
AT+BLEADVSTART
AT+BLEADVSTART
OK
+BLECONN:0,"57:22:cb:0d:f0:aa"
+BLECFGMTU:0,185
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"
+READ:0,"57:22:cb:0d:f0:aa"But with my customized gatt service, I cannot, and uart looks like it's not correct:
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at
at
OK
AT+BLEINIT=2
AT+BLEINIT=2
OK
AT+BLEGATTSSRVCRE
AT+BLEGATTSSRVCRE
OK
AT+BLEGATTSSRV?
AT+BLEGATTSSRV?
+BLEGATTSSRV:1,0,0x,1