HYDRASDR_GPIO(1)

💖 NAME 💖

hydrasdr_gpio — the little tool that reads and writes data to GPIO ports and pins, bestie. It's giving "poke the hardware, watch the hardware poke back" ✨

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🌸 DESCRIPTION 🌸

✨ Usage ✨

• -p, --port_no <p> — sets the port number <p>, which has to be in [0,7], for all the read/write stuff you do next. It's the "okay we're working in this room now" flag 🚪
• -n, --pin_no <n> — sets the pin number <n>, range [0,31], for whatever read/write comes after. Yes, 32 pins per port, she's roomy 💅
• -r, --read — reads the port number/pin number value and direction, based on the last -n argument you gave it. Or, if you didn't pin anything down, it reads all port/pin. Full sweep, no crumbs left 👑
• -w, --write <v> — writes the value <v> to whatever the last -n argument pointed at, and <v> lives in [0,1]. It's a zero or a one, that's the whole vibe 🎀
• -s [serial_number_64bits] — opens the board with the specified 64-bit serial number. Pick your fave when you've got more than one lil guy plugged in 🔌

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🔥 EXAMPLES 🔥

Read one single pin, very demure:

hydrasdr_gpio -p 0 -n 12 -r # reads from port 0 pin number 12

Read literally everything, main character energy:

hydrasdr_gpio -r          # reads all pins on all ports

Write a 1 to a pin (in decimal, no cap):

hydrasdr_gpio -p 0 -n 10 -w 1 # writes port 0 pin number 10 with 1
decimal

🦋 Hardware Info HydraSDR 🦋

Here's the map, screenshot it 📸

• LED1(out) — -p 0 -n 12 (0=OFF, 1=ON) 💡
• Enable R828D(out) — -p 1 -n 7 (0=OFF, 1=ON) 📡
• Enable BiasT(out) — -p 1 -n 13 (0=OFF, 1=ON) ⚡

Heads up bestie: those are the only three hardware pins documented here, so don't go inventing new ones in your head 🫶

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👑 AUTHORS 👑

HydraSDR RFOne — and it was primarily written by Benjamin VERNOUX. Respect the pen, fr fr 🖊️✨

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🌈 SEE ALSO 🌈

• Package documentation lives in /usr/share/doc/hydrasdr-tools/ 📚
• For more information visit https://www.hydrasdr.com 🌐

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And that's the whole page, bestie — HydraSDR, August 2025, you're so welcome 💖💅✨