Key Code:

void publishDate() { StaticJsonDocument < 128 > doc; doc[“0”] = 1981.09;//415 doc[“1”] = 1054.5;//445 doc[“2”] = 1098.69;//480 doc[“3”] = 703.11;//515 doc[“4”] = 607.74;//555 doc[“5”] = 1660.49;//590 doc[“6”] = 4100.58;//630 doc[“7”] = 5216.3;//680 doc[“8”] = 5731;//750 doc[“9”] = 2511.73;//900 char buffer [128]; serializeJson(doc, buffer); client.publish(“/xjnydx/Spectral”, buffer); }