diff --git a/main.py b/main.py
index b5591db..c7dfd4c 100644
--- a/main.py
+++ b/main.py
@@ -1,5 +1,5 @@
 def main():
-    print("Hello from siglent-sdg!")
+    print("Impedance Analyzer v1")
 
 
 if __name__ == "__main__":
diff --git a/src/siglent_sdg/siglent.py b/src/siglent_sdg/siglent.py
new file mode 100644
index 0000000..c8a4153
--- /dev/null
+++ b/src/siglent_sdg/siglent.py
@@ -0,0 +1,96 @@
+import wave
+from pyvisa.resources.resource import Resource
+import pyvisa
+from enum import Enum
+import numpy as np
+
+
+class Waveform(Enum):
+    SINE = "SINE"
+    SQUARE = "SQUARE"
+    RAMP = "RAMP"
+    PULSE = "PULSE"
+    NOISE = "NOISE"
+    ARB = "ARB"
+
+
+class ChannelID(Enum):
+    CH1 = 1
+    CH2 = 2
+
+
+CHANNEL_COUNT = 2
+
+
+class Channel:
+    def __init__(self, channel_id: ChannelID, instr: Resource):
+        self.id = channel_id
+        self.index = channel_id.value
+        self.instr = instr
+
+    # ---- Basic waveform ----
+    def set_waveform(self, waveform: Waveform):
+        self.instr.write(f"C{self.index}:BSWV WVTP,{waveform.value}")
+
+    def set_frequency(self, freq: float):
+        self.instr.write(f"C{self.index}:BSWV FRQ,{freq}")
+
+    def set_amplitude(self, amplitude: float):
+        self.instr.write(f"C{self.index}:BSWV AMP,{amplitude}")
+
+    def set_offset(self, offset: float):
+        self.instr.write(f"C{self.index}:BSWV OFST,{offset}")
+
+    # ---- Output control (merged) ----
+    def set_output(self, state: bool):
+        cmd = "ON" if state else "OFF"
+        self.instr.write(f"C{self.index}:OUTP {cmd}")
+
+    # ---- Convenience ----
+    def apply_sine(self, freq: float, amp: float, offset: float = 0):
+        self.set_waveform(Waveform.SINE)
+        self.set_frequency(freq)
+        self.set_amplitude(amp)
+        self.set_offset(offset)
+
+    # ---- Query ----
+    def get_frequency(self) -> float:
+        response = self.instr.query(f"C{self.index}:BSWV?")
+        return float(response.split(",")[1])
+
+
+class GenChannels:
+    def __init__(self, instr: Resource):
+        self.instr = instr
+        self.channels = {
+            ChannelID.CH1: Channel(ChannelID.CH1, instr),
+            ChannelID.CH2: Channel(ChannelID.CH2, instr),
+        }
+
+    def __getitem__(self, ch: ChannelID) -> Channel:
+        return self.channels[ch]
+
+
+class SiglentGen:
+    def __init__(self, visa_address: str):
+        rm = pyvisa.ResourceManager()
+        self.instr: Resource = rm.open_resource(visa_address)
+
+        self.channels = GenChannels(self.instr)
+
+        self.initialize()
+
+    # ---- Initialization ----
+    def initialize(self):
+        self.instr.write("*RST")
+        self.instr.write("*CLS")
+
+    # ---- Global commands ----
+    def identify(self) -> str:
+        return self.instr.query("*IDN?")
+
+    def close(self):
+        self.instr.close()
+
+    def get_error(self):
+        return self.instr.query("SYST:ERR?")