M5 Dial and wired ethernet is possible?

kokany

Hello all!

Is it possible M5 Dial extend with any wired ethernet module, like a W5500?
I'm open to any solution.

Thank you!

felmue

short answer: not easily / not together with the display.

Long answer: the issue I see is that the SPI pins used for the display are not accessible from the outside. This means it would need a second SPI instance using the pins available on port A and B. Unfortunately the M5-Ethernet library uses the first SPI instance hard-coded. See here.

So yes, M5Dial can be extended with Ethernet, but not together with the display or one would need to modify the M5-Ethernet library accordingly.

Please note: it's entirely possible there is another way I do not see right now.

Thanks
Felix

MitchBuckanon

Hi all,

like you, @kokany, I'm very interested in this solution of adding an Ethernet port to the M5Dial, as I won't be in an environment with Wi-Fi coverage.

Have you found a viable and stable solution since your last post, or is @felmue's solution the most reliable?

I know this is an old thread, but I can't find it discussed anywhere else.

Thanks a lot to the community; it's great to be able to help each other on a forum like this.

Mitch

felmue

Hello @MitchBuckanon

Arduino Espressif library now contains Ethernet drivers for W5500 and it seems W5500 can be used without RST or INT.

I successfully ran ETH_W5500_Arduino_SPI example with Base LAN module connected to M5Dial via port A and B. I only needed to adapt SCLK, MOSI, MISO and CS to the proper GPIOs and set RST and INT to -1 (eg not used).

Thanks
Felix

MitchBuckanon

@felmue

Thanks a lot,

i'm beginner for all of that..

When you say that SCLK, MOSI, MISO and CS need to be adapted to the proper GPIOs and RST and INT set to -1, could you explain it in simpler terms for a beginner? I saw the code you linked to, but I don't know where to start.

Thanks in advance

Mitch

robski

@MitchBuckanon M5Dial has 2 external ports PortA and PortB
PortA -> G15/G13/V/G
PortB ->G/V/G2/G1

Pins G15/G13/G2/G1 are programmable so can be used (reconfigured) to be SPI pins SCLK, MOSI, MISO and CS - needed to connect - communicate with - external device like Lan Module

m5dial ports.JPG

felmue

Hello @MitchBuckanon

like @robski mentioned, M5Dial has two ports: A and B which gives you 4 GPIOs you can use. In my test I configured the GPIOs like below:

#define ETH_PHY_CS    1
#define ETH_PHY_IRQ  -1
#define ETH_PHY_RST  -1
#define ETH_SPI_SCK  13
#define ETH_SPI_MISO 15
#define ETH_SPI_MOSI  2

Below is how I wired M5Dial to the LAN module (using a Bus Module) and some Grove/Dupont cables.

Hope this helps.

Thanks
Felix