Many IR receivers on a single ESP32 using RMT?

[michcfr]

Hello,
I need to connect many IR receivers on a single ESP32 using RMT.
Can RMT manage multiple IR receivers?
If yes, what is the maximum IR receivers can I connect?
What is the more appropriate ESP32 model you would advise?

Thank you

[MicroController]

https://esp32.com/viewtopic.php?f=13&t= ... 41#p141112

[ok-home]

hi not really, in the link the calculation of the maximum number of bits,
for esp32 channels is 8 rx or tx
esp32s2 is 4 rx or tx
esp32s3 4 rx and 4 rx
esp32c3 2 rx and 2 tx

[michcfr]

ok so RMT can manage only one IR receivers?

[ok-home]

ok so RMT can manage only one IR receivers?

esp32 8 transmitter or 8 receiver or 4 transmitter and 4 receiver .....

[michcfr]

I need 16 IR receivers managed by a single ESP32 using RMT.
Can we imagine the multiplexing of IR receivers? For example, one channel manages 2 IR receivers each?

[ok-home]

What speed do you need?

[michcfr]

What speed do you need?

Two configurations:
-At least 56khz per IR receiver.
-At least 15Mhz per IR receiver

[ok-home]

and all receivers work simultaneously or in turn ?

for simultaneous mode for 56khz you can take data from 16 gpio (i2s/cam) in parallel in dma mode and process it software
for 15mhz so most likely will not work

for serial mode - just switch gpio to the required rmt channel.

[michcfr]

and all receivers work simultaneously or in turn ?

for simultaneous mode for 56khz you can take data from 16 gpio (i2s/cam) in parallel in dma mode and process it software
for 15mhz so most likely will not work

for serial mode - just switch gpio to the required rmt channel.

All receivers work simultaneously for both cases.
For the 16 gpio in parallel in dma mode: can we go above 56Khz? what would be the maximum khz?