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Published 20 hours ago • verified publisher icon Xinyuan-LilyGO

CAN485 ESPHome using CAN

Open drawlusyk opened this issue 10 months ago • 3 comments

Does anyone have suggestions on using 2 CAN485 connected vi can h & l. I have used mcp2515 in esphome successfully but can not get these working. I have them flashed and blinking the led but not send/receive of can messages between the two. I have wires from h to h and l to l. Is any termination required?

`time:

  • platform: sntp on_time:
    • seconds: /5 then: #trying variations
      • canbus.send: data: [0x09, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16]
      • canbus.send: can_id: 2 data: [0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08]
      • canbus.send: [ 0x11, 0x22, 0x33 ] `

`canbus:

  • platform: esp32_can tx_pin: GPIO27 rx_pin: GPIO26 can_id: 1 #the second device is can_id 2 bit_rate: 1000kbps #have also tried 250kbps on_frame:
    • can_id: 0 #have tried 0 as well as 1/2 for accepting from the other device can_id_mask: 0 use_extended_id: false then:
      • lambda: |- std::string b(x.begin(), x.end()); ESP_LOGD("canid 2", "%s", &b[0] );`

drawlusyk avatar Apr 22 '24 14:04 drawlusyk

Same here. Can't get CAN working with esphome and T-CAN485. My YAML looks similar to those from @drawlusyk, i'm using interval and not time. I tried it with a 120R resistor for termination. In https://github.com/Xinyuan-LilyGO/T-CAN485/blob/main/doc/schematic.pdf on page 2 section B-2 there is a 120R resistor (RY2) between CANL and CANH. So i think there is already termination on the board? But i'm not familiar with schema drawings.

I found https://github.com/Xinyuan-LilyGO/T-CAN485/issues/16#issuecomment-1872327090 describing that Output Section is obviously. Is there something similar for CAN?

Anyone any ideas or suggestion?

teunito avatar May 22 '24 12:05 teunito

@drawlusyk You can refer to the code of other contributors: https://github.com/Xinyuan-LilyGO/T-CAN485/issues/16#issuecomment-2125876729

Llgok avatar Jul 10 '24 08:07 Llgok

Hello. I have uploaded the code used. If this is not what you are referring to, please advise.

-Dennis

On Wednesday, 10 July 2024 at 10:13, LILYGO_L @.***> wrote:

@.***(https://github.com/drawlusyk) You can refer to the code of other contributors: #16 (comment)

— Reply to this email directly, view it on GitHub, or unsubscribe. You are receiving this because you were mentioned.Message ID: @.***>

drawlusyk avatar Jul 11 '24 07:07 drawlusyk