If you check the datasheet, the maximum current when transmitting at max power is 225 mA , so 3/4 W power. Quite a lot. Even receiving it's 80 mA (1/4 W - I wouldn't call that 'ultra low power')Smartisan wrote:Maybe sounds a little crazy,but the temperature is terrible.We use the esp32 in a little size,so the layout size is limited.Could you please give me some good suggestion to reduce the current or the power waste？ Isn't the esp32 Ultra-low power consumption？
One thing is to reduce power, other is to reduce temperature. For minimum power, have the minimum tx and rx time. Keep it in reset or sleep (if there is such mode).
To reduce temperature, have a generous ground plane on the bottom pad with plenty of vias to a bigger ground plane on internal planes or bottom side.
For hand soldering I'd suggest some large vias (0.8 - 1 mm ID) that solder can flow through.
Thermal design is a discipline in itself. Not all boards and designers have robustness and reliability in mind. It seems you plan to stream video so I'm assuming long tx times, then high power. What you need is a thermally good design.