Newbie Problem setting remote Pin to High with API Frame

XBee & XBee Gateway
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1

I have 2 x Series 1 xBee with the following config:-

xBee 1
Product Family: XB24
Function Set: XBEE 8092.15.4
Firmware version: 10ed
ID: 3001
DL: 1
MY: 2
CE: Coordinator [1]
AP: API enabled w/PPP [2]
DD: 10000
D1: DO Low [4]

xBee 2
Product Family: XB24
Function Set: XBEE 8092.15.4
Firmware version: 10ed
ID: 3001
DL: 2
MY: 1
CE: End Device [0]
AP: API enabled w/PPP [2]
DD: 10000
D1: DO Low [4]

I have both xBee connected to PCs with USB UART and have successfully passed data between them. I am now trying to use the Coordinator xBee1 to set the D1 pin of the End Point xBee2 to High[5] using an API frame created in XCTU. The frame I have created is as follows:

0x17 – Remote AT Command
16-bit dest. Address: 00 02
AT Command: 44 31 (D1)
Parameter Value: 35 (5)
Generated Frame = 7E 00 10 17 01 00 00 00 00 00 00 00 00 00 01 02 44 31 35 3A

The Remote command response is as follows:
7E 00 0F 97 01 00 13 A2 00 40 B5 DE 9C 00 01 44 31 01 CC

- Start delimiter: 7E
- Length: 00 0F (15)
- Frame type: 97 (Remote Command Response)
- Frame ID: 01 (1)
- 64-bit source address: 00 13 A2 00 40 B5 DE 9C
- 16-bit source address: 00 01
- AT Command: 44 31 (D1)
- Status: 01 (Status Error)
- Checksum: CC

Question: Why am I returning a Status Error? What configuration have I missed? Everything else works as documented, but when I try and change the pin settings, something is blocking it? Any help would be very much appreciated.

2

Newbie problem, newbie error; the Parameter Value needs to be 05 and not 35 and then it works. 05 sets it to high and 04 sets it to low, simples. I can see I’m going to need to get a better handle on hex (0x or base16) to program an xBee.

3

Ok, I get it now. If its a character string (incl alphanumeric) then you do an ASCII to Hex conversion; if it’s numeric then a decimal to hex conversion.