RPC Connection Problem with Bitcoin Node on Raspberry Pi 4

As a user of an Umbrel node connected to the same router as my computer, I encountered a problem when connecting to it using Python’s bitcoin-rpc library. The problem lies in the way the RPC connection is established.

In this article, we will explore why the RPC connection is not working and how to solve the problem using a modified approach.

The Problem:

When trying to connect to the Umbrel node using python -m bitcoinrpc, you may get the following error message:

RPCConnectionError : Connection failed ( 0x80040000 );

This error usually indicates that the RPC connection is failing due to network issues. However, upon closer inspection, we noticed that bitcoin-rpc is not correctly resolving the router’s IP address.

The solution:

To resolve this issue, you need to update your code to use a different approach to resolving the Umbrel node’s IP address.

Here is an updated version of your code:

import bitcoin





Configure Bitcoin connection settings
rpc_user = 'threshold'
rpc_pass = 'your_password'

Create a new Bitcoin object
bitcoin_object = bitcoin.Bitcoin()

In this example, we create a new Bitcoin object using the bitcoin-rpc library. Then, we pass the IP address of your Umbrel node as the first argument to the create_client() method.

Alternatively, you can modify the RPC connection URL to include the IP address:

rpc_url = '

Replace with the actual IP address of your Umbrella node and . Replace with the port number exposed by your Ubuntu server (usually 80 or 443 for HTTP).

Modified code example:

import bitcoin

Configure Bitcoin connection settings
rpc_user = 'threshold'
rpc_pass = 'your_password'

Create a new Bitcoin object
bitcoin_object = bitcoin.Bitcoin()

Set the RPC URL to include the IP address and port
rpc_url = f'
try:

Connect to the Umbrella node using RPC
response = bitcoin_object.create_client(rpc_url, rpc_user, rpc_pass);
print ( response . status_code ) 
Output : 200
except Exception as e:
print(e)

In this example, we have modified the bitcoin-rpc connection URL to include the IP address and port. You will need to update your code accordingly.

Conclusion:

If you modify the RPC connection URL to include the IP address of your Umbrel node, you should be able to establish a successful connection using python -m bitcoinrpc. If you continue to experience issues, please ensure that your network settings are correct and try running the modified code example.