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Just a general question, but maybe also an idea. |
Answered by
awawa-dev
Sep 2, 2026
Replies: 1 comment 7 replies
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Hi Direct Ethernet link RPi ↔ Gledopto + port forward 8888 → 80 1. Create static IP on eth0sudo nmcli con delete gledopto-link 2>/dev/null || true
sudo nmcli con add type ethernet ifname eth0 con-name gledopto-link \
ipv4.method manual \
ipv4.addresses 192.168.50.1/24 \
ipv4.never-default yes \
connection.autoconnect yes
sudo nmcli con up gledopto-link2. Install and configure dnsmasq (force single IP)sudo apt update
sudo apt install -y dnsmasq
sudo tee /etc/dnsmasq.conf > /dev/null << 'EOF'
interface=eth0
bind-interfaces
domain-needed
bogus-priv
# Always give 192.168.50.50 for its Ethernet client
dhcp-range=192.168.50.50,192.168.50.50,255.255.255.0,24h
dhcp-option=3,192.168.50.1
EOF
sudo systemctl restart dnsmasq
sudo systemctl enable dnsmasq3. Connect the cable and wait for the lease# Wait 10-20 seconds after connecting the cable, then check:
cat /var/lib/misc/dnsmasq.leases
ping -c 3 192.168.50.50You should see 4. Enable IP forwardingecho 'net.ipv4.ip_forward=1' | sudo tee /etc/sysctl.d/99-ipforward.conf
sudo sysctl -p /etc/sysctl.d/99-ipforward.conf5. Port forward RPi:8888 → Gledopto:80sudo iptables -t nat -F PREROUTING
sudo iptables -t nat -F POSTROUTING
sudo iptables -F FORWARD
sudo iptables -t nat -A PREROUTING -p tcp --dport 8888 -j DNAT --to-destination 192.168.50.50:80
sudo iptables -t nat -A POSTROUTING -d 192.168.50.50 -p tcp --dport 80 -j MASQUERADE
sudo iptables -A FORWARD -p tcp -d 192.168.50.50 --dport 80 -j ACCEPT
sudo iptables -A FORWARD -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT6. Make everything persistentsudo apt install -y iptables-persistent
sudo netfilter-persistent saveTest From any device on your normal network: You should get the Hyperk web interface at 192.168.50.50 (RPi's internal Ethernet): 
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7 replies
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I find it very convenient right now, since I can place my capture solution, RPI, and Apple TV 2–3 meters away from the TV and only need to run:
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@awawa-dev one small question, i currently have a small issue if with GLEDOPTO starts before the rpi. 
It is still on "Effect". So it ignores the udp stream? After reboot just the GLEDOPTO it jumps directly to UDP: 
Logs from HyperHDR |
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If no cable was connected when the ESP32 started booting, or if the RPi didn't boot fast enough to handle it, the ESP32 can start the WiFi and you will get an additional Ethernet interface later. However, the WiFi must be configured in this case, because otherwise the AP mode disables most network services. |
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@awawa-dev ah okay! Yes i can confirm. I add additionally back my wifi config und now it works without any issues. (i use a main -> follow multi-socket power strip to power my rpi and my GLEDOPTO if my tv starts) |
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Thanks again awawa :) The fact that you help random people... seriously, wow! :o |
Answer selected by
awawa-dev
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Hi
Yes, it works for me and you don't need a crossover cable - just a regular Ethernet cable:
Direct Ethernet link RPi ↔ Gledopto + port forward 8888 → 80
1. Create static IP on eth0
2. Install and configure dnsmasq (force single IP)