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flyingflo / heat_can

CAN bus interface firmware for my Logamatic heating
GNU General Public License v3.0
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Connecting the MCP2515 to ECO_BUS Logomatic #1

Closed alesha76 closed 2 months ago

alesha76 commented 3 years ago

Question how did you connect the MCP2515 pins (H) and (L) to the ECO_BUS Logomatic connector (1, 2, 3) there are (2) and (3) involved.

flyingflo commented 3 years ago

I don't remember exactly. 1 is the ground/shield. Just measure the voltage on the terminals, the higher voltage is CAN_HI, the lower CAN_LO. But hold on a second, MCP2515 is the CAN controller, there must be an CAN transceiver between it and the bus lines.

alesha76 commented 3 years ago

By Logamatic it is clear. It turns out that in addition to NodeMCU and the MCP2515 board, there should be a transceiver? Is this another shield ? It is a pity that there is no schema in the Wiki.

flyingflo commented 3 years ago

There should be a tranceiver on the CAN board/shield. Otherwise, it wouldn't be usable..

On Sat, 2021-01-30 at 14:41 -0800, alesha76 wrote:

By Logamatic it is clear. It turns out that in addition to NodeMCU and the MCP2515 board, there should be a transceiver? Is this another shield ? It is a pity that there is no schema in the Wiki. — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe.