Twillio and Webhooks

I’m trying to pass the TO and FROM phone numbers using the data filed in Particle.publish and webhooks.
Below is what I have but I get an error 21602Message body is required.

I tried different options but nothing seems to work and I can only get it working by specifcing the TO and FROM using the form as shown here

  sms = String::format("{\"From\": %s, \"To\": %s, \"Body\": \"body\"}",setEmailString.c_str(), setPhoneString.c_str());
      Particle.publish("twilio_sms", sms, 60, PRIVATE);
    "event": "twilio_sms",
    "url": "****************************/Messages",
    "requestType": "POST",
    "noDefaults": true,
    "rejectUnauthorized": true,
    "json": {
        "data": "{{{PARTICLE_EVENT_VALUE}}}"
    "auth": {
        "username": "************************",
        "password": "***********************"

Not sure if this will solve your problem but you need to wrap your %s placeholders in escaped double quotes too.

  sms = String::format("{\"From\": \"%s\", \"To\": \"%s\", \"Body\": \"body\"}",setEmailString.c_str(), setPhoneString.c_str());

You can even stick with Form over JSON.
For that you’d just pass {{{To}}}, {{{From}}} and {{{Body}}} instead of the hardcoded numbers and the entired event data {{{PARTICLE_EVENT_VALUE}}} as body into the respective form fields.


Perfect, it works!

I didn’t know you can pass specific values. Thanks for the tip!

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