MODBUS_WRITE_REGISTE(3)

📦
version 3.1.6 · 3 versions
, in debian bookworm

✨ MODBUS_WRITE_REGISTE(3) ✨

okay so bestie, you're in the libmodbus manual, and this little page right here is all about modbus_write_register — one register, one value, no drama. 💅 (also lol the page name got cut off at the end, it's giving MODBUS_WRITE_REGISTE, we don't talk about it 🙈)

🌸 NAME 🌸

modbus_write_register — write a single register 🎀

🦋 SYNOPSIS 🦋

int modbus_write_register(modbus_t *ctx, int addr, const uint16_t
value);

💖 DESCRIPTION 💖

So here's the vibe. The modbus_write_register() function shall write the value of value holding registers at the address addr of the remote device. That's it, that's the whole assignment. 🫶

And like, how does it do it? It uses the Modbus function code 0x06 (preset single register). iconic behaviour, honestly. ⭐

🔥 RETURN VALUE 🔥

  • Success: the function shall return 1. slay. ✅
  • Not success: otherwise it shall return -1 and set errno. 💀 (yes, check errno, don't just ignore her)

🌈 SEE ALSO 🌈

the sibling energy is real, go read those too 🧚

👑 AUTHORS 👑

The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com> — main character energy fr fr. 💜

and that's the whole page bestie, ty for coming to my ted talk 💖

this has been libmodbus v3.1.6, dated 11/17/2025 — go write some registers, periodt ✨🎀🦋🌸💅

📦 where this page comes from