From 8e547294b0fd4c8041f4ee61f0a01b3a84b9a97d Mon Sep 17 00:00:00 2001
From: Daniel Friesel <daniel.friesel@uos.de>
Date: Thu, 9 May 2019 08:02:02 +0200
Subject: size_to_radio_energy: Add nRF24L01+ datasheet values
---
lib/size_to_radio_energy.py | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
diff --git a/lib/size_to_radio_energy.py b/lib/size_to_radio_energy.py
index 0b5cfd2..1cc9fd0 100644
--- a/lib/size_to_radio_energy.py
+++ b/lib/size_to_radio_energy.py
@@ -11,6 +11,8 @@ def get_class(radio_name: str):
"""Return model class for radio_name."""
if radio_name == 'CC1200tx':
return CC1200tx
+ if radio_name == 'NRF24L01dtx':
+ return NRF24L01dtx
def _param_list_to_dict(device, param_list):
param_dict = dict()
@@ -19,6 +21,7 @@ def _param_list_to_dict(device, param_list):
return param_dict
class CC1200tx:
+ """CC1200 TX energy based on aemr measurements."""
name = 'CC1200tx'
parameters = {
'symbolrate' : [6, 12, 25, 50, 100, 200, 250], # ksps
@@ -49,3 +52,43 @@ class CC1200tx:
duration += 8.00029860e+03 * 1/(params['symbolrate']) * params['txbytes']
return power * 1e-6 * duration * 1e-6
+
+class NRF24L01dtx:
+ """nRF24L01+ TX energy based on datasheet values (probably unerestimated)"""
+ name = 'NRF24L01'
+ parameters = {
+ 'symbolrate' : [250, 1000, 2000], # kbps
+ 'txbytes' : [],
+ 'txpower' : [-18, -12, -6, 0], # dBm
+ 'voltage' : [1.9, 3.6],
+ }
+ default_params = {
+ 'symbolrate' : 1000,
+ 'txpower' : -6,
+ 'voltage' : 3,
+ }
+
+ # 130 us RX settling: 8.9 mE
+ # 130 us TX settling: 8 mA
+
+ def get_energy(params):
+ if type(params) != dict:
+ return NRF24L01dtx.get_energy(_param_list_to_dict(NRF24L01dtx, params))
+
+ header_bytes = 7
+
+ # TX settling: 130 us @ 8 mA
+ energy = 8e-3 * params['voltage'] * 130e-6
+
+ if params['txpower'] == -18:
+ current = 7e-3
+ elif params['txpower'] == -12:
+ current = 7.5e-3
+ elif params['txpower'] == -6:
+ current = 9e-3
+ elif params['txpower'] == 0:
+ current = 11.3e-3
+
+ energy += current * params['voltage'] * ((header_bytes + params['txbytes']) * 8 / (params['symbolrate'] * 1e3))
+
+ return energy
--
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