ROS gps signal not stable

[ghost]

Hi, I am using this repo with Emlid Reach M+. I found if I just ran the ros node with

rosrun each_ros_node nmea_tcp_driver _host:=192.168.2.15 _port:=7777

Everything seemed fine. I could see the gps data from

rostopic echo /tcpfix

However, if I subscribed to /tcpfix and /tcpvel from another rosnode, I saw a lof of message like below. I guess this is coming from code in this repo. What is wrong?

[INFO] [1625265257.132378]: Successfully connected to device, starting publishing!
[WARN] [1625265262.141743]: Device disconnected. Reconnecting...
[INFO] [1625265262.150375]: Successfully connected to device, starting publishing!
[WARN] [1625265267.160317]: Device disconnected. Reconnecting...
[WARN] [1625265272.169778]: Socket connection timeout. Retrying...