Your problem is really not new and at the same time very new. Android and IOS will both try to get the fastest connection when connecting to WiFi AP. Both in a multi-Band will connect to the fastest. That said; When close to an AP the 5Gig Hz will be faster/stronger and the Smart phone or tablet wil...

ESP_Angus is right. Almost all FTDI chips can only supply 50mA, so when the WiFi goes live the BROWN OUT happens. On the FTDI there is usually a voltage select jumper 3.3V/5V. I piggy backed a LM1117-3.3 and tied the center pin to the LM1117 output (no more jumper) and brownouts stop since the 1117 ...

if you can As an experiment; Put a diode in series with the emitter to ground. If the base voltage is higher, around 1.6v, you may be sourcing to ground in which case you may need to look over your circuit for other issues. A possible backdoor approach; Tie another pin to the output pin and set it a...

NOTE the green wave in your 2nd scope picture. In each tower it is switching on and off at half the tower height. Not having your schematic, this leads me to think you are not at true GND with ref. to zero crossing or there is a wrong scope setting. NOTE the spikes on both the leading and trailing ...

Google Search.. Only those devices with the “+HS” suffix are capable of routing data through WiFi and achieving that 24 Mbps speed. “Bluetooth v3.0” devices are still limited to a maximum of 3 Mbps, but they do support other features introduced by the 3.0.... That said; I'm pretty sure ESP32 is BT ...

By the By; love your book it has been immensely helpful. I have 1 small suggestion though. When updates to your book come out, there is no way I see to know what areas have changed, so it's a complete re-read each time. -- An addendum page at the end of the book would be helpful here. Just a thought...

As noted above; #define ICMP_IRQ 15 is in the ..\espressif\esp32\tools\sdk\include\lwip\lwip\icmp.h [/i] but i can't seem to find any code that reacts to the ICMP_IRQ or even attach the IRQ. If I send a PING to the esp32 it responds so clearly the IRQ is processed somewhere. Is there any way to moni...

look at this thread it offers a simple timer.
It should get you going.

https://esp32.com/viewtopic.php?f=19&t=4673

yo have the right idea timer0 = timerBegin(0, 80, true); /* Attach onTimer function to our timer */ timerAttachInterrupt(timer0, &ontimer0, true); timer1 = timerBegin(1, 80, true); builds the timer object -- the 1 is the timer. you have 4 timers, 0-3 -- 80 is the time -- true makes it continuous/fal...

ESP has native hardware encryption for AES

this will connect just fine