Wifi very very slow

Official Hardware Nano Family Nano RP2040 Connect
1

I've been getting about 55bps - that's fifty five bytes per second.
Is that to be expected? For some reason I assumed it would be at least 10x that. I'm using the Adafruit esp32spi libraries in CircuitPython until we get MicroPython support but would like a sanity/expectation check.

What was the speed other users were managed to get through an esp32?

2

A lot depends on your WiFi and what type of load it is experiencing. You are connecting to something else, is that the reason for your slow response.

3

I'm connecting to a router at home. I can't imagine there's a bottleneck here - it's mostly idle.

4

Are there other WiFi systems in your area? They could kill the bandwidth. Also try it with a laptop and run the speed test. Is the system you are measuring your 55 bps capable of more? Test it with another system.

5

What speeds do you get with the Nano Connect and CircuitPython?

6

I did a quick test with the Arduino Nano RP2040 Connect connected to my WiFi router as a Webserver sending a web page to my Windows laptop connected to the same network. I did use a C++ example. So, it is not a fair comparison but maybe gives you a reference point.

The page is a single HTML around 400kB and took 17.8 seconds to load. During that time Windows network statistic showed 200kbit/s received and 8kbit/s send.

Wireshark shows that multiple prints where combined into IP packets (data size 1000 to 1400 bytes) which I guess is good for throughput.

How did you measure speed with your system?

7

Thank you so much! That's a great reference point. Pretty interesting.

I'm doing this:

@app.route("/1024")
def webapp_test(request):
    return('200 OK', [], ['a'] * 1024)

@app.route("/512")
def webapp_test(request):
    return('200 OK', [], ['a'] * 512)

@app.route("/32")
def webapp_test(request):
    return('200 OK', [], ['a'] * 32)

And all of them return with 55 bytes per second using wget at the command line. I tried different sizes thinking maybe the python libraries were only sending chunks per write (with an overhead per write or something).

Thanks again. At least I now know it goes faster than 55bps :slight_smile:

8

As a kind of funny update, I hacked together a CircuitPython firmware with the clockspeed doubled (250MHz). The download rates scaled (55bps at 125MHz, 130bps at 250MHz). So there we are - it's the "python tax". :slight_smile:

9

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