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I read snmp from a printer with node-red, and pass it via mqtt to an mqtt-app which uses jsonPath to parse the json.

The json is

[{"oid":"1.3.6.1.2.1.43.18.1.1.8.1.1",
 "value":
    {"type":"Buffer",
     "data":[48,49,48,45,52,50,49,58,82,101,112,108,97, 
             99,101,32,70,117,115,101,114,32,115,111,111,110,46]}}
,{"oid":.....

By using the this expression 

$[0].value.data

I get displayed 

[48,49,48,45,52,50,49,58,82,101,112,108,97,

This data is ascii, how do I get this displayed as characters?

Improve this question
2
  • So you would like to transform the array [48,49,48,45,52,50,49... to a corresponding string just by using a single jsonPath expression, that you'd enter in a mqtt app? Commented Dec 16, 2017 at 23:41
  • Yes, that's right. Commented Dec 17, 2017 at 0:35
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