Hi, I am trying to parse a JSON string which is returned from a webhook from AWS DynamoDB/Lambda/API Gateway. I am trying to use the “SparkJson” library but can’t figure out how to make it work. My JSON data looks like this: {"Data":{"batV":{"S":"4.00"},"deviceId":{"S":"540056000a51343334363138"…

I was able to get it to work with this test code: #include "Particle.h" #include "SparkJson/SparkJson.h" const char *rawJsonData = "{\"Data\":{\"batV\":{\"S\":\"4.00\"},\"deviceId\":{\"S\":\"540056000a51343334363138\"},\"lat\":{\"S\":\"41.2083\"}," "\"batSoC\":{\"S\":\"88\"},\"uvI\":{\"S\":\"0.0…

Thank you very much!! It worked almost perfectly. I only had to recast the the variable that initially holds the data from a const char* to char* since it’s from a Particle.subscribe.

another method to consider… Mustache Templates

[image] smd75jr: StaticJsonBuffer<200> jsonBuffer; // Initialize JSON buffer 200 bytes is not enough to hold that object in memory, even the json string is more than 200 chars, leading to partial parsing. The easy way out is using DynamicJsonBuffer it allocates the memory it needs on its own…

Yes, a mustache template is a great idea. Not only does this make the data significantly smaller, from 287 bytes to 187 bytes), but it also corrects the weird raw data format you have that makes everything a string. Here’s the mustache template: {"batV":{{Data.batV.S}},"deviceId":"{{Data.deviceId.…

Or, if you’re going to use mustache, you can just eliminate the entire JSON library, saving lots of code space and reducing the data down to 92 bytes. Mustache template: {{Data.batV.S}},{{Data.batSoC.S}},{{Data.lat.S}},{{Data.lon.S}},{{Data.uvI.S}},{{Data.wDir.S}},{{Data.wSpd.S}},{{Data.wGst.S}},{…

Hey guys, this might be a stupid question, so apologies for that in advance, but I cannot get my head around (I think it is my limited understanding of JSON) and maybe you can give me a hint. I am implementing a project to control a Philips Hue system. This works over a REST web service and I succes…

The backslashes are a C thing, not a JSON thing. Because strings in C are surrounded by double quotes, you cannot put a double quote in a C string unless you escape it with a backslash. The backslashes are removed by the compiler, so if you were to print out each character in the string from the C c…

Hey rickkas7, thanks for the swift response. Yes, I thought already it is something like that. I was just looking at the github page of the author of the original Arduino libary (from which the Spark one was ported) commenting on the example. There he explains… Here an example that parse the string…

Using SparkJson, you typically do something like: StaticJsonBuffer<512> jsonBuffer; JsonObject& root = jsonBuffer.parseObject(dataYouGotFromTheServer); The examples use a string hardcoded in the code, but you’d just pass the string directly into parseObject. Replace dataYouGotFromTheServer with th…

JSON Parsing Help

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JSON Parsing Help

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