diff --git a/.gitignore b/.gitignore
index 9f19284..0a973f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 .vscode/ipch
 report.xml
 output
+__pycache__
+.pytest_cache
diff --git a/testlib/Makefile b/testlib/Makefile
new file mode 100644
index 0000000..581cf96
--- /dev/null
+++ b/testlib/Makefile
@@ -0,0 +1,9 @@
+.PHONY: install test
+
+default: install test
+
+install:
+    pip3 install -r requirements.txt
+
+test:
+    ESP_PORT=/dev/ttyUSB0 pytest tests -v
diff --git a/testlib/__init__.py b/testlib/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/testlib/aprs_con.py b/testlib/aprs_con.py
new file mode 100644
index 0000000..b7d839d
--- /dev/null
+++ b/testlib/aprs_con.py
@@ -0,0 +1,83 @@
+import pytest
+import socket
+
+
+class AprsIs:
+    def __init__(self, callsign, passwd="-1", host="localhost", port=10152) -> None:
+        self.callsign = callsign
+        self.passwd = passwd
+        self.server = (host, port)
+        self.socket = None
+        self.buffer = ""
+
+    def connect(self):
+        if self.socket:
+            return False
+
+        self.socket = socket.create_connection(self.server)
+        peer = self.socket.getpeername()
+        print(f"Connected to {str(peer)}")
+        self.socket.setblocking(1)
+        self.socket.settimeout(1)
+        self.socket.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
+        banner = list(self._get_line())
+        print(f"Banner: {banner[0].rstrip()}")
+
+        self.send_line(
+            f"user {self.callsign} pass {self.passwd} vers testlib 0.1\r\n")
+
+        login = list(self._get_line())
+        # self.socket.setblocking(0)
+        print(f"login line: {login[0]}")
+        _, _, _, status, _ = login[0].split(' ', 4)
+        if status == "verified":
+            return True
+        self.close()
+        return False
+
+        # self._send_login()
+
+    def close(self):
+        if not self.socket:
+            self.socket.close()
+            self.socket = None
+
+    def send_line(self, line):
+        if self.socket:
+            self.socket.sendall(bytearray(f"{line}\r\n", encoding='utf8'))
+
+    def get_line(self):
+        line = self._get_line()
+        if line.startswith("#"):
+            return None
+        yield line
+
+    def _get_line(self):
+        if self.socket:
+            try:
+                buf = self.socket.recv(4096)
+                self.buffer = self.buffer + buf.decode('latin-1')
+            except:
+                pass
+            while "\r\n" in self.buffer:
+                line, self.buffer = self.buffer.split("\r\n", 1)
+                yield line
+        return None
+
+
+@pytest.fixture
+def APRSIS():
+    aprs = AprsIs("OE5BPA-1", passwd="22948",
+                  host="localhost", port=10152)
+    aprs.connect()
+    return aprs
+
+
+aprs = AprsIs("OE5BPA-1", passwd="22948",
+              #              host="localhost", port=10152)
+              host="rotate.aprs.net", port=10152)
+aprs.connect()
+while True:
+    line = list(aprs._get_line())
+    if len(line) > 0:
+        print(line)
diff --git a/testlib/common.py b/testlib/common.py
new file mode 100644
index 0000000..dc8bc96
--- /dev/null
+++ b/testlib/common.py
@@ -0,0 +1,5 @@
+import subprocess
+
+
+def runProcess(cmd):
+    subprocess.run(cmd, shell=True).check_returncode()
diff --git a/testlib/esp_dut.py b/testlib/esp_dut.py
new file mode 100644
index 0000000..8e3070b
--- /dev/null
+++ b/testlib/esp_dut.py
@@ -0,0 +1,63 @@
+import os
+import pytest
+import serial
+from testlib.common import runProcess
+
+
+class EspFlash:
+    def __init__(self, port):
+        self.pio_package_path = "$HOME/.platformio/packages"
+        self.port = port
+
+    def runESPTool(self, cmd):
+        runProcess(
+            f"/usr/bin/python3 {self.pio_package_path}/tool-esptoolpy/esptool.py --chip esp32 --port {self.port} {cmd}")
+
+    def erase(self):
+        self.runESPTool("erase_flash")
+
+    def write(self, addr, bin_file):
+        self.runESPTool(
+            f"--baud 460800 --before default_reset --after hard_reset write_flash -z --flash_mode dio --flash_size detect {addr} {bin_file}")
+
+    def verify(self, addr, bin_file):
+        self.runESPTool(
+            f"--baud 460800 --before default_reset --after hard_reset verify_flash --flash_mode dio --flash_size detect {addr} {bin_file}")
+
+    def make_spiffs(self, fs_path, fs_bin):
+        self.runESPTool(
+            f"{self.pio_package_path}/tool-mkspiffs/mkspiffs_espressif32_arduino -c {fs_path} -p 256 -b 4096 -s 1507328 {fs_bin}")
+
+
+class EspDut:
+    def __init__(self, port):
+        self.port = port
+        self.serial = None
+        self.flash = EspFlash(self.port)
+
+    def writeFlash(self, bin_dir, fs_path=None):
+        self.flash.erase()
+        if fs_path:
+            fs_bin = "spiffs.bin"
+            self.flash.make_spiffs(fs_path, fs_bin)
+            self.flash.write("2686976", fs_bin)
+        self.flash.write("0x1000",  f"{bin_dir}/bootloader_dio_40m.bin")
+        self.flash.write("0x8000",  f"{bin_dir}/partitions.bin")
+        self.flash.write("0xe000",  f"{bin_dir}/boot_app0.bin")
+        self.flash.write("0x10000", f"{bin_dir}/firmware.bin")
+
+    def openPort(self):
+        self.serial = serial.Serial(self.port, 115200, timeout=0)
+
+    def getLine(self):
+        return self.serial.readline()
+
+    def closePort(self):
+        if self.serial:
+            self.serial.close()
+            self.serial = None
+
+
+@pytest.fixture
+def ESP():
+    return EspDut(os.environ["ESP_PORT"])
diff --git a/testlib/requirements.txt b/testlib/requirements.txt
new file mode 100644
index 0000000..99e909e
--- /dev/null
+++ b/testlib/requirements.txt
@@ -0,0 +1,3 @@
+pytest
+pyserial
+aprs
diff --git a/testlib/testbinary/boot_app0.bin b/testlib/testbinary/boot_app0.bin
new file mode 100644
index 0000000..13562ca
Binary files /dev/null and b/testlib/testbinary/boot_app0.bin differ
diff --git a/testlib/testbinary/bootloader_dio_40m.bin b/testlib/testbinary/bootloader_dio_40m.bin
new file mode 100644
index 0000000..ac05788
Binary files /dev/null and b/testlib/testbinary/bootloader_dio_40m.bin differ
diff --git a/testlib/testbinary/firmware.bin b/testlib/testbinary/firmware.bin
new file mode 100644
index 0000000..021d5e7
Binary files /dev/null and b/testlib/testbinary/firmware.bin differ
diff --git a/testlib/testbinary/partitions.bin b/testlib/testbinary/partitions.bin
new file mode 100644
index 0000000..0e52b4c
Binary files /dev/null and b/testlib/testbinary/partitions.bin differ
diff --git a/testlib/tests/__init__.py b/testlib/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/testlib/tests/test_aprs.py b/testlib/tests/test_aprs.py
new file mode 100644
index 0000000..9d244b9
--- /dev/null
+++ b/testlib/tests/test_aprs.py
@@ -0,0 +1,5 @@
+from testlib.aprs_con import APRSIS
+
+
+def test_aprs_login(APRSIS):
+    pass
diff --git a/testlib/tests/test_basic.py b/testlib/tests/test_basic.py
new file mode 100644
index 0000000..8a3259a
--- /dev/null
+++ b/testlib/tests/test_basic.py
@@ -0,0 +1,16 @@
+from testlib.esp_dut import ESP
+
+
+def test_basic_port(ESP):
+    ESP.openPort()
+    ESP.closePort()
+
+
+def test_flash(ESP):
+    bin_dir = "testbinary"
+    ESP.writeFlash(bin_dir)
+    ESP.flash.verify("0x1000",  f"{bin_dir}/bootloader_dio_40m.bin")
+    ESP.flash.verify("0x8000",  f"{bin_dir}/partitions.bin")
+    ESP.flash.verify("0xe000",  f"{bin_dir}/boot_app0.bin")
+    ESP.flash.verify("0x10000", f"{bin_dir}/firmware.bin")
+    ESP.flash.erase()