rtrbt
commented
2 years ago Some additional tests with two ESPs as clients running the ESP-IDF 4.4.1 IPerf example as before and another ESP running the arduino-esp32 softAP example.
arduino-esp32 1.0.6
Interval Bandwidth
0- 3 sec 2.37 Mbits/sec
3- 6 sec 0.11 Mbits/sec
6- 9 sec 0.34 Mbits/sec
9- 12 sec 0.37 Mbits/sec
12- 15 sec 0.96 Mbits/sec
15- 18 sec 0.40 Mbits/sec
18- 21 sec 0.55 Mbits/sec
21- 24 sec 1.02 Mbits/sec
24- 27 sec 0.11 Mbits/sec
27- 30 sec 0.89 Mbits/sec
0- 30 sec 0.71 Mbits/sec
arduino-esp32 2.0.0 RC1
Interval Bandwidth
0- 3 sec 0.33 Mbits/sec
3- 6 sec 0.19 Mbits/sec
6- 9 sec 0.03 Mbits/sec
9- 12 sec 0.82 Mbits/sec
12- 15 sec 0.09 Mbits/sec
15- 18 sec 0.03 Mbits/sec
18- 21 sec 0.08 Mbits/sec
21- 24 sec 0.28 Mbits/sec
24- 27 sec 0.06 Mbits/sec
27- 30 sec 0.64 Mbits/sec
0- 30 sec 0.25 Mbits/sec
arduino-esp32 2.0.0
Interval Bandwidth
0- 3 sec 0.74 Mbits/sec
3- 6 sec 0.05 Mbits/sec
6- 9 sec 0.04 Mbits/sec
9- 12 sec 0.42 Mbits/sec
12- 15 sec 0.05 Mbits/sec
15- 18 sec 0.47 Mbits/sec
18- 21 sec 0.01 Mbits/sec
21- 24 sec 0.84 Mbits/sec
24- 27 sec 0.03 Mbits/sec
27- 30 sec 0.02 Mbits/sec
0- 30 sec 0.27 Mbits/sec
arduino-esp32 2.0.1
Interval Bandwidth
0- 3 sec 0.05 Mbits/sec
3- 6 sec 0.09 Mbits/sec
6- 9 sec 0.05 Mbits/sec
9- 12 sec 0.03 Mbits/sec
12- 15 sec 0.04 Mbits/sec
15- 18 sec 0.06 Mbits/sec
18- 21 sec 0.04 Mbits/sec
21- 24 sec 0.08 Mbits/sec
24- 27 sec 0.03 Mbits/sec
27- 30 sec 0.08 Mbits/sec
0- 30 sec 0.06 Mbits/secFor comparision: with a "proper" WiFi router as AP:
Interval Bandwidth
0- 3 sec 11.91 Mbits/sec
3- 6 sec 14.11 Mbits/sec
6- 9 sec 14.50 Mbits/sec
9- 12 sec 15.12 Mbits/sec
12- 15 sec 15.38 Mbits/sec
15- 18 sec 15.18 Mbits/sec
18- 21 sec 15.35 Mbits/sec
21- 24 sec 15.11 Mbits/sec
24- 27 sec 15.76 Mbits/sec
27- 30 sec 15.42 Mbits/sec
0- 30 sec 14.78 Mbits/sec
guestisp
StefanKellerAC
SonnyZheng
SuGlider
ttlappalainen
Saffarofski
jasongaunt
Board
ESP32-Ethernet-Kit V1.2, Tinkerforge ESP32 Brick (all flashed as ESP32 Dev Module)
Device Description
ESP32 Ethernet Kit: https://docs.espressif.com/projects/esp-idf/en/latest/esp32/hw-reference/esp32/get-started-ethernet-kit.html#get-started-esp32-ethernet-kit-v1-2
ESP32 Brick: https://www.tinkerforge.com/en/doc/Hardware/Bricks/ESP32_Brick.html ESP32 Ethernet Brick: https://www.tinkerforge.com/en/doc/Hardware/Bricks/ESP32_Ethernet_Brick.html
Hardware Configuration
Nothing else is attached to the boards.
Version
other
IDE Name
Arduino IDE
Operating System
Arch Linux
Flash frequency
80 MHz
PSRAM enabled
no
Upload speed
921600
Description
The WiFi performance of clients connected to an ESP running as softAP is extremely bad in my tests. I'm using the following test setup:
Both clients are connected to the access point, one runs as Iperf server, one as client with the following results: (Server)
(Client; note that the connection error after 30 seconds happens only because the server iperf command misses -t 30)
If I run exactly the same test, but don't use the arduino-esp32 WiFiAccessPoint example, but instead the ESP-IDF 4.4.1 wifi/getting_started/softAP example https://github.com/espressif/esp-idf/tree/master/examples/wifi/getting_started/softAP the throughput is still not great, but way better than before: (Server)
(Client; TCP error for the same reason as above)
If I use another Tinkerforge ESP32 Brick or ESP32 Ethernet Brick, as the softAP (instead of the ESP Ethernet Kit by Espressif), the performance stays the same.
If I use two linux PCs as Iperf server and client, both connected to a ESP softAP, the performance is as follows: (Running the ESP-IDF softAP example)
(Running the arduino-esp32 softAP example)
So the performance is much better in this case, however the ESP-IDF softAP is still faster by a factor of 6.
Sketch
Debug Message
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide