Modifying PSRAM configuration?

[r10kindsofpeople]

Apologies if these are less "sendspin" questions and more EspHome questions. I'm new to much of the ESP32 world, Sendspin and HomeAssistant despite a lifetime of working with microprocessors.
I'm trying to implement the TOSLINK no display version on a Seeed Studio XIAO ESP32-S3, it's not working and I note the following lines from the log, followed close after by lots of repeating red text:

[20:59:41]I (268) boot: Disabling RNG early entropy source...
[20:59:41]E (269) quad_psram: PSRAM chip is not connected, or wrong PSRAM line mode
[20:59:41]E (269) esp_psram: PSRAM enabled but initialization failed. Bailing out.
[20:59:41]E cpu_start: Failed to init external RAM; continuing without it.
[20:59:41]E (270) quad_psram: PSRAM chip is not connected, or wrong PSRAM line mode
[20:59:41]E (270) esp_psram: PSRAM enabled but initialization failed. Bailing out.

and found that the configuration contains the line psram: mode: quad. The specs say that this model of Xiao ESP32-S3 has 8MB of on-chip PSRAM and found elsewhere notes that seem to connect 8MB with "octal" mode. Am I at all on the right track, and if so, how do I go about getting the modified yaml file into the device? Or is the project assuming that all the internal PSRAM is available PLUS 4MB of external PSRAM and I should just go out and buy the board RealDeco used, which is a fair enough response.

Bonus question: Do I need to be using a beta version of EspHome for this? Attempts to upload a new yaml result in an error statement "Your ESPHome version is too old. Please update to at least 2026.5.0." but the released version is 2026.4.5.

[RealDeco]

yes it's for the next release, OR the current beta, and yes you need to change psram to octal, and flash size to 8mb for the xiao.
the release version of 2026.4.0 is only a few days away if you don't want to install the beta 👍

[Manu3l0us]

@r10kindsofpeople I use the Xiao successfully in the same config (SPDIF over coax, no display) with the changes noted by @RealDeco and can confirm that it works.

[ipalomo]

Hello, first of all thank you for your great job. I'm trying to build this sendspin receiver to plug it to my Bose Solo 5 sound bar with Toslink cable. I have available a Xiao ESP32-S3 Plus and the same DAC you mention in your guide. How can I modify the PSRAM and the Flash Size to fit my needs? I'm not planning to add a screen so I believe I should use Sendspin Zero No Display Analog firmware, am I right?

[RealDeco]

if you want to use toslink then you don't need the DAC, just a toslink connector., and it's the No Display Digital you want then.