Low Rate WIFI Protocol LR

[rudi ;-)]

@ivan
how does this looks to you

step1_low_rate_connecting_test.png (80.96 KiB) Viewed 10120 times

will test on weekend the thing outside.
txs for allways teaching us in the right position!

best wishes
rudi

SoftAp: DevKitC V 2
Station: ESP32 Demo Board V2

[rudi ;-)]

Could not wait and not sleep
think it looks good..

the world's first "hello world" with low rate on esp32
done!
left tcp server with low rate
listen
after client connect , send hello world

right tcp client with low rate
connect and receive data

step2_low_rate_tcp_server_and_client_hello_world_test.png (79.26 KiB) Viewed 10112 times

best wishes
rudi

[rudi ;-)]

ok, ready now for walking/flying
will add ping response time and GPS

wifi_scan-chn_rssi_.png (71.6 KiB) Viewed 10107 times

best wishes
rudi

[asfakrahman86]

what is the working distance did you get?

[Valerii]

Hi, I tried this code with present version of ESP-IDF and it fails. What could went wrong?
The debug console returns

Code: Select all

"I (91) wifi: wifi firmware version: 403db1d
I (91) wifi: config NVS flash: enabled
I (91) wifi: config nano formating: disabled
I (91) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (101) system_api: Base MAC address is not set, read default base MAC address from BLK0 of EFUSE
I (131) wifi: Init dynamic tx buffer num: 32
I (131) wifi: Init data frame dynamic rx buffer num: 32
I (131) wifi: Init management frame dynamic rx buffer num: 32
I (131) wifi: wifi driver task: 3ffc02bc, prio:23, stack:4096
I (141) wifi: Init static rx buffer num: 10
I (141) wifi: Init dynamic rx buffer num: 32
I (151) wifi: wifi power manager task: 0x3ffc4efc prio: 21 stack: 2560
W (151) wifi: [b]ap start fail[/b]"

If I comment line with

Code: Select all

esp_wifi_set_protocol

it works.

Please help

[Valerii]

Hello, all
I've prepared LR protocol demo based on 2 esp-wroom32 dev boards. I used esp-idf's tcp-perf example as base to prepare RX and TX nodes. I set up channel and protocol (

Code: Select all

WIFI_PROTOCOL_LR

) and during the test I've got about 0.23Mbits/s throughput but the link range is similar to the same setup but using 802.11B protocol. The minimal RSSI level I've got was -92dBm.
Any advice to make the link range wider?

[StijnVerhelst]

Could not wait and not sleep
think it looks good..

the world's first "hello world" with low rate on esp32
done!
left tcp server with low rate
listen
after client connect , send hello world

right tcp client with low rate
connect and receive data

step2_low_rate_tcp_server_and_client_hello_world_test.png

best wishes
rudi

Hello,
For my end-project for school I'm also exploring the world of the ESP32 LR mode. The distance I could get with this was around 140 meter. This was when sending only the character 'b' with this code I've found on the internet: https://github.com/jnogues/ESP32-Long-Range-WiFi.

1. Do you know how I can expand this distance (more than 140 meter), I'm using the doit esp32 devkit v1 without external antenna.
2. Do you still have the code that you were using at Thu Mar 30, 2017. With the "world's first "hello world" with low rate on esp32"?

Kind regards,
Stijn Verhelst