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 2026/2/12    16:04       210869 TT19_Li_A7670_Mul_HTTP_Standard_V3.2.dfu
 2026/2/12    16:04       213605 TT19_Li_A7670_Mul_MQTT_Standard_V3.2.dfu
 2026/2/12    16:04       202429 TT19_Li_A7670_Mul_TCP_Standard_V3.2.dfu