@david The "current" field holds the current temperatures of all the configured heaters including bed+chamber heaters. You need to have a look at the tools.*.heaters arrays to get the corresponding indices for the "current" field (type 2). Bed and chamber still provide separate "current" fields for the temperature so you don't need to worry about that. See https://reprap.org/wiki/RepRap_Firmware_Status_responses for futher details.
