---
name: "isotpsend"
section: "1"
platform: "linux"
package: "can-utils"
version: "2023.03-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/isotpsend"
---

# isotpsend(1)

manual page for isotpsend 2023.03-1

## NAME

isotpsend - manual page for isotpsend 2023.03-1

## SYNOPSIS

**isotpsend** \[*options*\] *\<CAN interface\>*

## OPTIONS

- **-s** \<can\_id\>

  (source can\_id. Use 8 digits for extended IDs)

- **-d** \<can\_id\>

  (destination can\_id. Use 8 digits for extended IDs)

- **-x** \<addr\>\[:\<rxaddr\>\]

  (extended addressing / opt. separate rxaddr)

- **-p** \[tx\]:\[rx\]

  (set and enable tx/rx padding bytes)

- **-P** \<mode\>

  (check rx padding for (l)ength (c)ontent (a)ll)

- **-t** \<time ns\>

  (frame transmit time (N\_As) in nanosecs) (\*)

- **-f** \<time ns\>

  (ignore FC and force local tx stmin value in nanosecs)

- **-D** \<len\>

  (send a fixed PDU with len bytes - no STDIN data)

- **-l** \<num\>

  (send num PDUs - use 'i' for infinite loop)

- **-g** \<usecs\>

  (wait given usecs before sending a PDU)

- **-b**

  (block until the PDU transmission is completed)

- **-S**

  (SF broadcast mode - for functional addressing)

- **-C**

  (CF broadcast mode - no wait for flow controls)

- **-L** \<mtu\>:\<tx\_dl\>:\<tx\_flags\>

  (link layer options for CAN FD)

CAN IDs and addresses are given and expected in hexadecimal values. The pdu data is expected on STDIN in space separated ASCII hex values. (\*) = Use '-t ZERO' to set N\_As to zero for Linux version 5.18+