[Solved] Node-RED: How do I assign the value from msg.payload.svalue1 to a variable?

The discussion addresses how to extract and assign the numeric value from the field `svalue1` within a JSON payload received via MQTT in Node-RED. The payload originates from Domoticz sensors and includes multiple fields such as Battery, RSSI, dtype, idx, and svalue1. The user seeks to isolate the value "55.5" from `msg.payload.svalue1` and store it in a variable for use in other functions. The recommended approach involves using JavaScript within a function node, specifically parsing the string value to a float with `parseFloat(msg.payload.svalue1)` and assigning it to a variable. To verify the assignment, the use of a debug node is suggested to output the message object. Additionally, the concept of global variables in Node-RED is referenced for sharing data across functions. The conversation highlights beginner-level questions about JavaScript usage in Node-RED and the practical steps to manipulate and debug message payloads.
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